As always love the garage (ghetto) setup, just like mine. You must have at least 3 different circuits in your garage though don't you?
I have a gable vent at the top of mine which I place a box fan blowing out and added some larger vents for intake, works great.
For sound control, other than fan mods, I considered building a sound baffle case out
of MDF and an itntake and exhaust fan, but maybe it's best open air while it's cold around 40f without anything running.
Waiting on taxes to purchase to try out. Can't wait another 3 weeks, eek.
No years ago I wired my home.
I lived in New Jersey the home was built in 1970 during the Vietnam War the USA had a copper shortage and a few states allowed for Aluminum wiring.
BAD BAD BAD many house fires. So NJ came up with the law that if it is your home and you live in it you can diy your house wire. Just pull a permit from your town and have the town inspect it.
So I went from 100 amp to 200 amp 20 circuits to 40 circuits. I did everything but the actual box. Saved a ton of money and ran lots of circuits to the garage.
My garage has 5x 20 amp circuits for 120 volts wired with 10 awg wire.
I can do 9000 watts of power in the garage safely. It is too hot for that even in the winter.
So I run 8 sp20's at 1200gh/600 watts = 4800 watts.
If I were alone in the house I would have purchased the 15 unit farm and run 15 of these all around the house.