sounds like you have alot of overhead but a 2000 watt grow should yield alot if its your first grow it might be lower but once you get things dialed in there is no reason you shouldnt be able to consistently yield 2.5 to 3.5 lbs per harvest or even more with co2.
think you spend alot more than most growers as you have rent, that is a big expense. also think you could easily reduce your electricity and nute cost if you wanted to wich would help some but the rent is the main expense and dont think any commercial grower would consider it worth the risk to spend that much just to grow, although you are doing it atleast partly for your personal use sounds like you may be spending more to grow than what you may have spent to support your habbit to begin with.