Ummmmmmm -so why exactly are you looking at buying 3 primes?I don't like swapping lenses on the go. It's bad enough swapping the UV filter for the polarizer (which I love) of which I only have to do once or twice a day.
Personally, I feel a Laowa 7.5, Olympus 12, and Panasonic 20 would give a good range without stepping on each other's toes.
Nothing to fear in changing lenses. In ten years of shooting primes, and swapping lenses like a mofo, in the middle of desserts, snow, rain, etc etc, I've yet to clean a sensor. The high frequency sensor shakers/cleaners on today's cameras do an outstanding job. The results are worth it I think