100 DIY Upgrades for Under $100
Conceal Your Air Conditioner
How to do it: Hide a through-wall air conditioner inside a stock kitchen cabinet you can close when the unit's not in use. Paint the cabinet the same color as your walls so it'll "disappear," or choose wood-veneer doors to mimic a pricey built-in.
Estimated cost: 36-by-18-inch Akurum fan cabinet with oak-veneer doors, about $88; IKEA