Since you are retired, you do have some time to look at the options and talk to the people.
If you're payments have been kept up, you might be able to refinance it with a lower interst rate. We financed part of ours at 3% even.
Since you don't like driving the large one but still want a MH, talk to some dealers about trading it in for a smaller one that you can enjoy and possibly with a smaller payment considering what you still owe on the larger one. They'll want to make a sale and they can be creative.
Renting it through a dealer is certainly a possibility.
You have time, go talk to people.
Bill