If you happen to own a French press, just put your ground coffee in there with water and either leave on the counter or place in the fridge. Next day, stir if you like, press and pour. No fancy equipment, no new equipment.
Warning - it may not live up to the hype. I consider it fine, but not life-changing or "I'll never make hot coffee again."
Update: also works well if you have a drip coffee maker with filter, or a pourover - just put coffee and water in a bottle/jar in the fridge, shake occasionally, and pour through the filter part when you want it. No need to turn the machine on.