I would put a 1000 HPS in there but that's just me, overkill. A 600 would work very well even a 400. Heat is the problem that you face the most with the big lights. You need A/C.

Sounds like you have a lot of reading to do. With that said. The world of hydro is your oyster. We use 10 gallon sterilite tubs with 6 - 3 inch netpots with hydrotron rocks a small water pump for drip. This what we started with and what works best for us. We have used just bubblers, they work well too.
We could fit 3 of those in your space maybe even 5. 3 units would be 18 plants,if all goes well over a LB of med's depends on the strain.

Go look through the grow logs and look at the different types and see what you like or can fit in your space.

When you look at the cost of setup and then the cost to run it, It may seem a good bit but nothing compared to meds on the street. It pays for it's self quick. The best thing is nothing is better than what you grow.