I scan with a 5D Mark 3 and get scans that easily convert(*) into decent images. I also often use an EOS M6 because it focuses more easily, be it with autofocus or manually. My lens is an EF 100 Macro (the old model) that is attached to my setup with a tripod mount ring. This gives me a fairly stable setup and I can switch cameras on the fly.
I see no need to buy a scanner.
(*) I have difficult negatives that ask for a lot of adjustments. Converting photos taken in decent light on newer film is easy though.