We built our 6x8 coop as a shed for the specific reason that if the "chicken thing" didn't work out, we'd have a usable, functional building. I put in insulation, house windows, wired it for electricity (and heat) and have a nice, wide, human sized door. It's certainly big enough to use as a studio. Or a playhouse, or a potting shed, or even a party cabana. And because it's painted inside, all it takes to clean it out is soap and water. No smell. I say go for it.