Never feel bad about rehoming an animal as long you’r e diligent in vetting a new home.
Something that everyone who’s feeling overwhelmed should consider is, getting a little help. People are often happy to volunteer their help just to get to interact with animals they can’t keep themselves. I found once I hired employees that my passion wasn’t dying, my life had just evolved and my anxiety that I didn’t have time to properly care for everything was overwhelming me.
Now I keep my collection growing and evolving with a small village to support it and the villagers (whether paid or volunteers) get a huge amount of enjoyment out of it. And I keep my house cleaner because people are always coming over 
My collection is quite a bit larger than average (200+), and at times it was a serious burden. I ramble about on this thread if you want to take a look.