It started in 2009 when I bought an A-Frame travel trailer like the one below. No bathroom, but otherwise surprisingly comfortable for 2 people. The top triangular part folded down for road travel, could be expanded to full size in 2 minutes. It was a trial balloon to see if I liked RVing. I most definitely did - and still do. Trish and I got together shortly after I got the rig. She already had RV experience, having lived in a fifth wheel for several months.
We upgraded to a 30' Cougar fifth wheel in 2013. Cougars are low-end rigs with all the basics but few amenities - so we added several: plumbing and lighting fixtures, light-filtering and blackout shades, several more. We would have gladly kept the rig for many more years, had I not bought a new truck in 2017; it's side rails were too high to fit under the trailer overhang. Oops!