Well it certainly sounds like you're a lot further into photography and associated equipment and activities than I have ever been. Repairing cameras certainly exceeds my talents and the idea is frankly scary to me.
I dunno what to tell you: For me, film accounts for a small percentage of my total output, but sometimes I just get the itch for it. The grain, the nonlinearities, the whole thing. Developing and scanning can be a pain, but seeing the results emerge still gives me a rush of excitement.
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For my part, photography as been pretty much an occasional activity, though one I've stuck with for many decades. I haven't attempted film developing since high school -- a very long time ago. I have done a fair bit of film and print scanning, though. If I were ever to dally again with film, I'd leave the development to the photo shop, but scan the film myself. (I don't know if color positive (slide) film is even available today, but of course my scanner hard- and software can handle color and b&w negative).