We bought our DP when I was 50 It was the best unit I could have hoped for and my DW and I saw a great amount of this country. All of this happened as we worked through our own business keeping in contact with customers while still enjoying some fairly long road trips. The MH IMHO is the fastest to set up and take down and allows a lot of convenience when traveling. A DP with 100,000 on it and on a good chassis is no problem. I would stay away from gassers on the GM and Ford platforms with 100,000 miles on them.
I used the Verizon MIFI for my internet and always had a secure web experience. Use park wifi when just screwing around online.
We are now headed towards more of a full retirement and we think our camping will be more destination for 2-4 weeks at a time so we have moved into a 3 slide TT Using the TV for our excursions.