if you have the room in your panel, it is super easy to add additional circuits. There are books on home wiring, and if you are the homeowner, it's generally a legal thing to do.

drop a new circuit in and pull some wire. If your panel is in your basement and that''s where you are growing it's a piece of cake.

I suggest putting in twice as much as you think you'll need so you don't need to do it again if you decide to add something else with a big draw...