I'm sorry, but $800 for that job sounds like a rip. Even with a small sub panel box, wire, outlets, etc. there is less than about $125 worth of materials involved and maybe 4 hours of labor, depending on how long the run is, whether the wire has to be fished through walls, etc. Running a 220 line isn't going to save you any amps. Yes, 220 only draws half the amps of 110 but it requires two spots in the breaker box for a double pole breaker. You can install two single pole 20 amp breakers and run two 20 amps circuits in the same space that double pole breaker will take up. So it's a wash. If this were my project I'd run a 40 amp line to a small sub panel box, then two 20 amp circuits off of it and do away with the power box. This is simple to do and I'd gladly help you with it. Have you added up all the amperage from your equipment? As previously mentioned, by code you can't exceed 80% of the rated circuit amps. So on a 40 amp circuit, or two 20 amp circuits, the max you can draw is 32 amps.
Also, if you go with a licensed electrician he will likely require that you get a permit, which will subject you to an electrical inspection by your local code officer. Do you really want them in your house, looking at a potential grow space? Something to think about.
