diff --git a/src/com/danitheskunk/skunkgame/Building.java b/src/com/danitheskunk/skunkgame/Building.java
new file mode 100644
index 0000000..7577268
--- /dev/null
+++ b/src/com/danitheskunk/skunkgame/Building.java
@@ -0,0 +1,56 @@
+package com.danitheskunk.skunkgame;
+
+import com.danitheskunk.skunkworks.Vec2i;
+
+public class Building {
+	private final String name;
+	private final String displayName;
+	private int count;
+	private Button button;
+	private final Cost cost;
+
+	public Building(String name, String displayName, Cost cost) {
+		this.name = name;
+		this.displayName = displayName;
+		this.cost = cost;
+		this.count = 0;
+		this.button = new Button(Vec2i.ZERO, displayName);
+		this.button.onClick(() -> {
+			if(canAfford()) {
+				buy();
+			}
+		});
+	}
+
+	public void setButtonPos(Vec2i pos) {
+		button.setPos(pos);
+	}
+
+	public boolean canAfford() {
+		return cost.canAfford();
+	}
+
+	public void buy() {
+		if(cost.canAfford()) {
+			cost.use();
+			count += 1;
+			button.setCount(count);
+		}
+	}
+
+	public boolean isButtonVisible() {
+		return count > 0 || canAfford();
+	}
+
+	public Button getButton() {
+		return button;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public int getCount() {
+		return count;
+	}
+}
diff --git a/src/com/danitheskunk/skunkgame/Button.java b/src/com/danitheskunk/skunkgame/Button.java
index 2a1fbc8..ca47532 100644
--- a/src/com/danitheskunk/skunkgame/Button.java
+++ b/src/com/danitheskunk/skunkgame/Button.java
@@ -7,9 +7,9 @@ import com.danitheskunk.skunkworks.gfx.vt.Terminal;
 import java.util.concurrent.Callable;
 
 public class Button {
-	private final Vec2i pos;
+	private Vec2i pos;
 	private static final Vec2i SIZE = new Vec2i(32, 3);
-	private final Recti rect;
+	private Recti rect;
 	private final String label;
 	private int count;
 	private Runnable clickCallback;
@@ -49,4 +49,9 @@ public class Button {
 	public void setCount(int count) {
 		this.count = count;
 	}
+
+	public void setPos(Vec2i pos) {
+		this.pos = pos;
+		this.rect = new Recti(this.pos, SIZE);
+	}
 }
diff --git a/src/com/danitheskunk/skunkgame/Cost.java b/src/com/danitheskunk/skunkgame/Cost.java
new file mode 100644
index 0000000..44a4717
--- /dev/null
+++ b/src/com/danitheskunk/skunkgame/Cost.java
@@ -0,0 +1,24 @@
+package com.danitheskunk.skunkgame;
+
+public class Cost {
+	private final CostElement[] elements;
+
+	public Cost(CostElement[] elements) {
+		this.elements = elements;
+	}
+
+	public boolean canAfford() {
+		for(var element : elements) {
+			if(element.getAmount() > SkunkGame.getRes(element.getRes())) {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	public void use() {
+		for(var element : elements) {
+			SkunkGame.addRes(element.getRes(), -element.getAmount());
+		}
+	}
+}
diff --git a/src/com/danitheskunk/skunkgame/CostElement.java b/src/com/danitheskunk/skunkgame/CostElement.java
new file mode 100644
index 0000000..98add09
--- /dev/null
+++ b/src/com/danitheskunk/skunkgame/CostElement.java
@@ -0,0 +1,19 @@
+package com.danitheskunk.skunkgame;
+
+public class CostElement {
+	private final String res;
+	private final double amount;
+
+	public CostElement(String res, double amount) {
+		this.res = res;
+		this.amount = amount;
+	}
+
+	public String getRes() {
+		return res;
+	}
+
+	public double getAmount() {
+		return amount;
+	}
+}
diff --git a/src/com/danitheskunk/skunkgame/Resources.java b/src/com/danitheskunk/skunkgame/Resources.java
deleted file mode 100644
index 08a905a..0000000
--- a/src/com/danitheskunk/skunkgame/Resources.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package com.danitheskunk.skunkgame;
-
-public class Resources {
-	public double wood;
-	public int den;
-
-}
diff --git a/src/com/danitheskunk/skunkgame/SkunkGame.java b/src/com/danitheskunk/skunkgame/SkunkGame.java
index 2c3b14c..9eef6fb 100644
--- a/src/com/danitheskunk/skunkgame/SkunkGame.java
+++ b/src/com/danitheskunk/skunkgame/SkunkGame.java
@@ -1,7 +1,6 @@
 package com.danitheskunk.skunkgame;
 
 import com.danitheskunk.skunkworks.BaseGame;
-import com.danitheskunk.skunkworks.Recti;
 import com.danitheskunk.skunkworks.Vec2i;
 import com.danitheskunk.skunkworks.WindowStretchMode;
 import com.danitheskunk.skunkworks.gfx.Color;
@@ -9,57 +8,102 @@ import com.danitheskunk.skunkworks.gfx.IRenderContext;
 import com.danitheskunk.skunkworks.gfx.vt.Terminal;
 
 import java.util.ArrayList;
+import java.util.Dictionary;
+import java.util.Hashtable;
 import java.util.List;
 
 public class SkunkGame extends BaseGame {
 	private Terminal term;
 	private double timeSinceLastUpdate;
 	private double timePerUpdate;
-	private Resources res;
+	public static Dictionary<String, Double> res;
+	private List<Building> buildings;
 	public static Vec2i mousePos;
-	private List<Button> buttons;
+	private List<Button> actionButtons;
 
 	public SkunkGame() {
 		super(new Vec2i(1280, 700), "SkunkGame v0.0.0");
 		window.setStretchMode(WindowStretchMode.ASPECT);
 		var font = window.loadFontTileset("fonts\\ega-8x14.png");
 		term = new Terminal(new Vec2i(160, 50), font);
-		res = new Resources();
+		res = new Hashtable<>();
+		buildings = new ArrayList<>();
 		timePerUpdate = 1.0;
-		buttons = new ArrayList<>();
+		actionButtons = new ArrayList<>();
+
+		res.put("wood", 0.0);
+
+		addBuilding(
+			"den",
+			"Den",
+			new CostElement[]{new CostElement("wood", 10)}
+		);
 
 		var woodButton = new Button(new Vec2i(31, 0), "Gather Wood");
-		woodButton.onClick(() -> res.wood += 1.0);
-		buttons.add(woodButton);
+		woodButton.onClick(() -> addRes("wood", 1.0));
+		actionButtons.add(woodButton);
+
 
-		var denButton = new Button(new Vec2i(31, 4), "Den");
-		denButton.onClick(() -> {
-			if(res.wood >= 10.0) {
-				res.wood -= 10.0;
-				res.den += 1;
-				denButton.setCount(res.den);
-			}
-		});
-		buttons.add(denButton);
 	}
 
 	private void drawScreen() {
 		term.clear(Color.BLACK);
 		drawResources();
 		term.drawVerticalSingleLine(new Vec2i(30, 0), term.getSize().getY());
+
+		var buttons = new ArrayList<Button>();
+		buttons.addAll(actionButtons);
+		for(var building : buildings) {
+			if(building.isButtonVisible()) {
+				buttons.add(building.getButton());
+			}
+		}
+		int i = 0;
 		for(var button : buttons) {
+			button.setPos(Vec2i.add(new Vec2i(31, 0),
+				Vec2i.mul(new Vec2i(0, 3), i)
+			));
 			button.render(term);
+			++i;
 		}
 	}
 
 	private void drawResources() {
 		term.drawString(new Vec2i(0, 0), "Wood:");
-		term.drawString(
-			new Vec2i(18, 0),
-			String.format("%d", (int) res.wood)
+		term.drawString(new Vec2i(18, 0),
+			String.format("%d", (int) getRes("wood"))
 		);
 	}
 
+	public static double getRes(String name) {
+		return res.get(name);
+	}
+
+	public static void setRes(String name, double count) {
+		res.put(name, count);
+	}
+
+	public static void addRes(String name, double count) {
+		setRes(name, getRes(name) + count);
+	}
+
+	private void addBuilding(
+		String name, String displayName, CostElement[] cost
+	) {
+		buildings.add(new Building(name, displayName, new Cost(cost)));
+	}
+
+	private Building getBuilding(String name) {
+		//todo: optimise
+		for(var building : buildings) {
+			if(building.getName().equals(name)) {
+				return building;
+			}
+		}
+		return null;
+	}
+
+
 	private void tick() {
 
 	}
@@ -79,9 +123,14 @@ public class SkunkGame extends BaseGame {
 		}
 		mousePos = Vec2i.div(window.getMousePos(), term.getFullCharSize());
 		if(window.isMouseClicked(0)) {
-			for(var button : buttons) {
+			for(var button : actionButtons) {
 				button.processClick(mousePos);
 			}
+			for(var building : buildings) {
+				if(building.isButtonVisible()) {
+					building.getButton().processClick(mousePos);
+				}
+			}
 		}
 	}