You may be going overboard here, you have 2 sons sometimes let them help you, they should want to. Set up a once a quarter “See Mom Day” where they not only can spend time with you but take care of things you may have let slip.
I visited dad at least weekly trying to help him take care of things, and was glad to do so. A main issue I had was he wouldn’t spend money (that he had) on himself, such as replacing his 150lb CRT TV with a modern flatscreen.
My kids do offer to help, but one lives two hours away, and comes to visit when he can, and I go visit him. My youngest will help if I ask him, but I prefer not to, because by the time he gets around to doing it, I've already done it myself. I save myself a lot of aggravation that way. I don't need to set up "see mother" visits. I see them and speak to them regularly. I'm just a very independent person who has lived alone for a very long time, and prefer it that way.