When I bought my first dynohub over a decade ago, I used that wheel on three different bikes. Eventually, I bought more dynohubs. No longer have to move that wheel to different bikes.

My point is that if you have several bikes that have the same wheel size and same type of axle, you could get by with one dynohub wheel. Then later if you like it enough, get more. If you had some bikes with rim brake and some with disc, you could have a wheel built up with a disc hub and rim brake rim, so that the wheel would work on both. I have one such wheel, although the only reason I built the wheel that way was that the hub that I wanted was out of stock so I got the hub that also worked with disk.

But the axle could be an issue if some are thru axle, some are quick release. There are ways to make a through axle wheel work on a quick release bike, but that gets more complicated with adapters.

Side note: I use a bolt on skewer on my dynohub wheels, not a quick release skewer. I suspect most thieves in my community do not know what a dynohub is, but I am sure some do. I want to make sure that the opportunist thief can't grab my wheel. Thus, that type of skewer. I keep a 5mm allen wrench for my skewer packed with my spare tube.