Cub Cadet just stop moving while I was mowing.

check that the towing disengagement lever(s) haven't popped out... I doubt this is the problem but worth checking first.

No, I'm up on that. But thanks for mentioning it. That was the first thing I checked when I jumped off the mower when it stopped rolling.

if you lack the funds, at age 80 you need someone who can assist you with things you cannot do yourself. If the kids can't or won't help dad, or there are none, time to start attending the house of worship of your faith and get to know some of the folks who like to help. You can always volunteer babysitting in the nursery, or teaching sunday school to help reciprocate for the help.