I have a toyhauler. use it to haul three ATV's. we cross country race. I will be retiring within the next year or two and have same idea as you. that said a couple of things I've learned - started with a gas 2500 pulled fine but 5mpg doesn't go far. finally went to 2500 diesel empty 20's pulling 10-12mpg. that is a big savings. my main passion is bass fishing and want to bring bass boat when we travel. I will not pull behind rv. I plan on having wife pull boat and I will pull rv. extra vech to use. last two things it ain't cheap to travel and stay that long. my plans our to buy a lot "south" with utilities and use that as my base to explore the area. cheaper in long run. finally get a toyhauler with the biggest garage you can get you dont know what you will buy down the road. I'm retired military also. plan on using base rv parks when I can. more affordable and secure.