OP said he has an HOA, I doubt they would approve of anything like that sitting outside (at least in his front yard/porch).
Garage works, just have to be creative in how you vent things and create air flow.
The guy in florida, two ton hasher, does great stuff on his porch, if youve got a porch to do it i'd go with that.
I've seen his youtube videos, if we're talking about the same guy. Rigs in wooden boxes on the enclosed porch? You're right. Seems like he's doing very well even in the humid weather down there.