1. Buy a remote control electrical outlet thingy. The one I purchased controls three different units.
2. Buy a 3 way splitter for each electrical outlet thingy. Plug into the outlet thingy.
3. Buy some small par cans. Search the web for the best deal. Most run in the $20 range.
Get some colored gels.
Make sure wherever you buy your par cans that you buy a safety cable for each one. You don't want them falling from the ceiling and cracking someone on the head.