Depends a lot on the legalities of your situation (and I suppose, whether or not you care for them). Where I'm at I can only grow a few at a time medically so I find scrog is the best method for this.
I don't claim to be an expert by any means on scrog or setting it up in a larger scale setting such as yours. However, what I do know about it would suggest the following: Your ceiling is only 8 foot and I'm assuming your ventilation and lighting system is going to consume at least 1-2 feet. So that gives you around 6 foot of grow space. I think you can get up to potentially 2 or 2 1/2 foot long cola's.
I edited this below === That much lighting in a 13x13 area would give you basically 3 air-cooled lights for each canopy which could be about 4x12 or a total canopy sq footage of 48. That would be giving you around 112/w a sq foot. However, you are going to require walking space and work room to get down and trim the undergrowth while your room is only 13x13. So realistically, your screens (canopies) would most likely be smaller, perhaps 3x11 or 3.5x11.5 depending on what is comfortable for you. If 3x11, thats 163/w a sq ft.
As you can see, you can focus your lights into each canopy 3 x 3 x 3 and produce very effective yields.
You would probably need to keep the tip-top of your buds at least 10 inches away from your light. So for mathematicals sake let's say a foot, and your lighting takes up 2 already, which gives you a top layer sitting at around 5 feet. Scrogging from the floor to screen-level is going to require, again for mathematicals sake, around 2.5 or 3 feet which leaves you with potential lengths of let's just say 2 feet on your Cola's coming off the screen.
Take it or leave it for what it's worth, but I believe that on a 3x11 screen you could fill it easily with 3-4 plants. If you are allowed up to 12 plants, you would be within your means. To make maintenance on each individual plant even easier -- if your growing with soil for example -- just create individual screen for the plants and line them up underneath your daisy-chained lighting.
Hope this helps you or gives you some ideas maybe. Good luck man. Sounds like it's going to be a fun setup regardless of the grow method you choose.
EDIT: My wattage math was using your total wattage but we should only use what is directly above (1800w). So your 33sq ft canopy would actually be shed with around 55 w a sq foot, not 163 as stated above. This is still pretty good I believe. Your lighting should be on adjustable hanging pulley systems so you can keep them within optimal range of your canopies at all times.
