It's not a big deal to add breakers to your panel and run another circuit or two. I bought one of those basic code books years ago and haven't got a shock once. Hate shocks so I'm damn careful. My place is wired light industrial so have 5 - 220v lines already wired in the shop and a dozen 110v duplex plugs. Ran a 220 line into the grow room using standard 110v wire that I split to two duplex 110v plugs and they share the neutral with no
problems. 15A breaker on each hot wire. Run the 1000W HID on one and any fans etc on the other.
My heater is on another line and I took one of the existing 220 lines into there to wire up a 220v/500W baseboard heater that I'm a little puzzled about how to wire it in. I didn't notice it was 220 when I bought it and hooked it up with 110 like you would expect and it just barely got warm. Checked out the box to see it was.220. The instructions basically show that you hook up the hot wires on either side of the heating element and the neutral goes to ground. My 220 lines are just three wires. Two hots and a neutral. The stove and dryer are the usual 4 wire plugs but inaccessible from the basement where the main grow room is.
I'll figure it out.