Congratulations. Similar story. Quit drinking at 37, started hiking when I quit smoking at 42, climbed some serious mountains (Aconcagua the most serious), did some 400 to 600 mile thru-hikes, turned 71 and the knees don't have it any more.
Would have loved a Sportmobile, absolutely loved it, not in the budget. Got an older Intervec which was given to me, and it's the next thing to thru-hiking. I think it's biggest use may be to drive 100 or 2000 miles to hike, and then not have to drive home. Take a shower, have a hot meal, watch a movie or read a book, scratch the dog's ears and off to sleep.
I think you made a couple of wise choices.