Best thing to do is keep the machines you know you will have time to use.
I too use a modern PC most of the time as I am sure many do. WinUAE is more convenient, faster, runs on a laptop so I can have it anywhere. Now, also they have old games coming out on tablets and phones which is awesome. I have Alien Breed on my playbook and iPad, Bards tale, Defender of the Crown along with others. Another World on Android.
I have a Powerbook G4 running MorphOS for a "pure" Amiga experience.
But nothing takes me back to the day like sitting in front of the old hardware and kicking it on. So I have my main 1000/3000 and 4000, a 600, 1200 and 500 to take to shows. CD32, CDTV. Seems a lot but I am also looking at what i have and use and as you get older the longer you dont use something the less likely you ever will. So some of the extras I have, the other stuff I've bought (Apple, Atari) that I dont use will go soon to make the room more enjoyable.
Best bet, look at what you use and enjoy. Sell the rest of it but keep the ones you like (and some extra parts for those if you have them). Even if you put them away someplace for now. At least you know most likely you will come back to them at some point when you have time.