I don't know if I would do a tiny house, after living in the trailer for a few months. I don't see myself having the time to build a tiny house, and with how much a prebuilt one costs (plus whatever it costs to park it somewhere/buy and improve land), I could go through several RVs if I want to travel or pay for a good portion of a small house (<1200sq ft).
I've actually done a couple mods in the last month. Got a dryer and made a window vent for it so now we don't need a big drying rack up all the time to keep up with laundry. I replaced the slide style thermostat with a battery powered digital one. Replaced the shallow two basin kitchen sink with a deeper, single basin stainless steel model.
(Tape was to remind us not to use it for 24 hours to let the silicone set.)