I remember in Toronto, back in the '70's, there was a shop where you could take your car to prepare it for painting. I did as much to the car at home as I could, removing trim, doing the body work, etc., because once you were in the shop, he charged you shop time, albeit at a fraction of the rate than if a body man were doing it. What it came down to was shop time for the final prep part of it.
He had all the tools and supplies you would need, and once you were done preparing, he would apply the paint in the paint booth.
I don't know if he is still in business, but it seems to me that this type of facility might exist in other cities today. It might be a solution for you.
MB 1986 190D in my past
MB 1987 300E on the street
MB 1994 'Smoke Silver' E420 in my driveway
1999 Mazda Miata in the fun stable
1964 E-Type Jaguar Coupe- Sold
1970 E-Type Jaguar Coupe- Sold
1968 Corvair Monza Conv. with Turbo Transplant- Sold
1986 Merkur Xr4ti- abandoned
various mundane American autos
If I'd known then what I know now...
Hell, I'd probably still have done it anyways.