We've had them all and now our MH. Went from a travel trailer to a fiver to get more room and storage space. A travel trailer can be matched to most pick ups up to a 3/4 ton. Don't know if these have auto levelers now but I'm sure things have come a long way. They are a bit more harder to line up to hookup getting the ball in the right spot.
Fivers can be bought that have as much space and storage as you want. But then the tow vehicle has to be considered very carefully. They're relatively easy to hook up compared to a TT. However you mentioned you're 70. I was one never to consider a MH as thought fivers had it all. But my back started giving me problems and climbing around the truck to hook things up was becoming bothersome. We had a 1 ton dually and a huge fiver. Loved it!
But now we have a MH and no more problems to worry about. Toad is easy to attach and I don't have to climb around to do it or get on my knees. Leveling is as easy as pushing a button inside after stopping. I'll never go back to the other two.