Even if you downsize, you still have problems with maintenance, lucky.
I live in a two bedroom bungalow, and yesterday woke up to the sound of running water, and it wasn't raining. The tap in my garage had sprung a leak, and the only way I could stop the flow was to turn off the water supply.
Fortunately a son lives in the same village, so he managed to replace my tap in the afternoon. It only cost me £14 instead of the £70-80 I was envisaging if I had to call out a plumber. Unfortunately, as you say, you do not have family to help out. A house share could be a way to find out what you want without selling your home.
At one time we moved into a house which was shared by a couple and his parents. The parents lived downstairs and the couple lived upstairs. It worked for them. It also meant we moved into a house with two bathrooms and two kitchens, which was useful when one of our sons moved in.
We had to move into a bungalow because my husband kept falling down the stairs.