Do a lot of research before starting this project, spending the time to research every detail will earn you the most amount of profit.
Yes, you can grow 1 lb plants, but there is a lot of research that goes into this. You will need to use hydroponics and deep water culture is a great place to start.
Your last question about burning your plants will be determined by how high your ceiling is.
Try to design your room to have a uniform canopy. 6 plants on a 4x8 won't be maximizing your lighting. You can do 1 plant per light, which is 2 per 4x8. If you try to put 3 per light at 1 lb per plant, it's impossible.
There are many questions that need to be answered in order to maximize your space and project.
If you're using individual large plants, you probably don't need tables. You can simply use a bucket system that is piped together and have them directly on the ground.
Design everything on paper before you begin, down to the inch. It sounds like you have a great opportunity here to do a nice grow...take your time and plan it correctly if you want to cash out handsomely in the end.
It's daunting for first timers, but you should research the Under Current system.