One of those types of places opened up near here about 20 years ago and only lasted 4 or 5 months.
The big issue was that these DIYers would rent a stall thinking they could knock something out pretty quickly and as per the usual when it comes to automotive problems, discovered Murphy’s Law takes hold pretty regularly. True back then and would be even more true now due to the vastly increased complexity of all cars.
Throw in their lack of expertise on top of this and they would often spend more on stall rent than they would if they had just paid someone to do the repair in the first place.