Well if you find within a year you don't like camping in a Casita, I doubt you will loose any money. It will sell quickly and probably at the price you purchased.
I don't think you mentioned having a dog. That is good in that the Independence has a very narrow floor space between the beds. even a small dog would not find it and easy place to lay down or more around.
Locally there is a 2014 Independence for sale. I looked at it and it is on outstanding condition. It belonged to a local man that was about to retire and travel. Unfortunately he was killed in a head on collision near Shreveport.
It is sitting in a lot in Glen Rose, TX. It is a place that refurbishes Air Streams and other classic vintage travel trailers. I went through it today. The gel-coat is still in real good shape, just a little chalky on the front and top. It could probably still be buffed out and waxed back to the original shine. The only two things I saw that need to be addressed, and they are minor, one of the tail light covers looks like it might be cracked and the two hinges for the cabinet door over the sink are very rusty and ought to be replaced eventually. It does have the furnace and awning.
It is listed for $18,000. However the business owner said they would take $16,000. It is not listed on Craigs List or either of the Casita Forums. The business owner said he has not had a chance to list it yet, he mentioned one obscure site I did not recognize.
If it is in your budget and you want to know more, I can go back get the phone number and take pictures.
I have no affiliation with the business owner or the owner of the Casita. I saw it because I have to drive past it every day going into town.
FYI I have 2003 Spirit Deluxe that we bought used 12 years ago. We use in year round. We were full time for a year and 6 months at a time for 3 years. Knock on wood, I've not had to replace any appliances. But I'm sure someday we will.
Good luck on making these decisions for the next season of your life. My inclination is pursue your desire to travel. Maybe keep your eyes open for a used 13" Scamp or Casita Patriot.
I have a son that is a senior in high school. When he graduates in a year I plan on hitting the road full time.