I quit the restoration shop.

I don't see why you didn't just list your garage as the place of business , as a 1099 sub -contractor you could show a separate business address from his shop , claim a couple of the cash side gigs you do to show other sources and carry on , heck you can even dedicate the sq footage in your garage shop and deduct as an expense as long as its dedicated space , as a builder/ carpenter I have been down this road a few times and learned claiming a couple of small jobs that only paid a couple of hundred bucks is worth a hell of a lot more than the tax saved by not claiming them in the long run .I'm glad to hear you were able to transition into a suitable plan B sounds like it's all working out .