I love peonies too. I have 4, but they don't do well. I think they don't get enough sun. I have them in front of crepe myrtle, which tends to be filled out just as the peonies need the sun.
I have so many flowers, I worry I won't be able to sell my house because of the potential work. But with perennials, it's not that bad. Just a bit of ground oak leaves over the top when we rake the yard and then rake out the dead in the spring.
And I really understand leaving the old behind. When we bought the house we are in, I had to leave all of my lily of the valley behind. This house didn't have a good location for transplanting some of it. We will be moving to Dallas, TX in a few years. I'll have to relearn all the varieties that do well.
We have a garden here in town, the Nan Elliott Rose Garden,
https://www.cityofaltonil.com/page/the-rose-garden/ , we were able to get it recognized as a national rose garden when I was president of the local National Rose Society chapter. But I don't have many roses anymore. I didn't have the time anymore and my sons needed the yard space for baseball, rope climbing, etc. But the miniatures make a wonderful driveway border and require less attention.