Simpler is definitely better Vic...but its not always easy.
Iv lived a lot of my Life on the farm, the road, and when not traveling i live as simple and as cheap as i can, Saving my money for things i want to do...things i enjoy.
Its important to find what makes you and your wife happy, i see little point in doing something if you are not truly happy doing it. Surprisingly few people in life really take the other path...and pursue what they really want, to easy to get stuck in our controlled molded society.
All depends on what makes "you" happy of course! "there is no One size fits all in life"
There are however a lot of people doing what you speak of...and there are a lot of options.
I have a few friends in the US living in a converted school buss that stay in national forests moving every 2 weeks, quite self sufficient. Lots of options house or property sitting for others. Another option is doing work camper work in lieu of rent and electric, there are Campgrounds and RV resorts all over the US where this is an option.
Ideally if you could buy some property, build a cabin and be self sufficient, fishing, hunting and growing your own food as much as possible.
Land is not cheap though.
I lived in Teepee for 7 months In the mountains in Colorado, fun but not the best structure for the cold weather, but i cut my own wood, canned all my food etc
here's the inside of my Teepee at the start.
A yurt makes a very very good Non permanent structure and many people live in them year round.
you can find a nice balance between modern conveniences and resource's ( like the internet ect) and the Tradition life style.
Nothings impossible...good luck and Enjoy the journey
Cheers Andy