You might check into hosting at a state park during your traveling. That way it saves on some of the costs in fulltiming. We hosts most of our time, that way, we are not out the expense of the campsite, and we can still do things in the area.
It actually has springs in it and when you receive it, it's in a box about 2ft x 2ft x 5ft. You take it out of the box, it's tightly wrapped in plastic, and you place the mattress where you want it. Then you carefully cut the plastic which releases the rolled up mattress and it also allows the mattress to expand to it's actual size. When all is done, you have a regular mattress but is better than any you can get for the same price. Also, you can order it as a short queen where I couldn't get one except from a dealership or Camping World.