Setup for 220. It's the way to go. My room has dedicated 220 for all lighting and 110 for all the rest, pumps, fans ect. You won't overload that circuit!
u can add 4 1000w lights. it would be really easy to pig tail a light controller to plug into old dryer plug. otherwise u will have to split it to 15a 220v plugs and individual timers for each light that have to sync up. also to be code u would need to make that 30a 220v into 2 separate 15a 220v circuits (because the plugs are only rated at 15a)