The gap nobody was filling
There are a lot of people in the Bay Area who know how to work on their own cars and have nowhere to do it. Apartment parking prohibits it. Landlords object. Street work means kneeling on asphalt in fading light with a jack you do not fully trust.
The default alternative is paying a shop $150–$200 an hour for labour you are entirely capable of performing. That is not a skills problem. It is a space and equipment problem, and it is a solvable one.

