It would need to be a really big workshop for it to work around 5-10 thousand square metres maybe even more. But it's doable it's just finacial side you'll need to worry about.
This is an example so no flaming .
Members, lets say like $20-30 per week. So if you have around 30-40 members, that an estimated $600-$1200 made.
Hiring of the bays: $60-$90 with 10,000sqm you could have around about 5-10 bays people could use so thats an estimated $600-900 made.
Hiring the suits: $10 thats $50-$100 made.
Lets say you have 3-4 spraying booths $40 for the week or whatever to hire + paint lets say around $400-$500 dollars worth thats estimated $1200-$2000 made.
Hiring of the tools lets say $50 for whatever you need, and if you have like 10 people working on their cars thats $500 made, if all the required tools aren't given back the price of the tool could be charged to you (to stop tools going missing).
Then you got to think to yourself. What happens if delays are made (car problems)
Extension of the hiring bays: Lets say $120 for every week or month up to you.
Then you got to work out if your going to take orders of car items (radiators,turbo's,intercoolers) and how much are you willing to charge.
Or you could even have an option of a specialist mechanic doing your work and if so how much are you going to charge?
Then you have to think of insurance of the tools and bills.
You could do monthly bookings, and with a big workshop you could satisfy everyone wanting work done on their cars.
