I used a home garage shop in the past for my sandrail and it cost me money. GD member to boot. No integrity and no culpability. Guess I expected the same professionalism as I provide in my line of work but no. Instead I got a bull shit answer to what went wrong and a bull shit offer to make it right.
You get what you pay for and if you need a leg to stand on when shit goes bad, forget it from a home garage or mobile person. You won't be made whole. Won't happen and just chock that up to you got effed. You wanna fight it. Go for it. I would rather eat it and if asked about that garage, provide my experience.
Your mileage may vary. Just my real experience.