I bought my 1969 Avion camper from my grandfather around 1983. I bought a truck with it so I don't know exactly what I paid for the camper, but it was probably around $1500 back then. Two years ago I put $16,000 into rebuilding it and putting it on a trailer, so I figure that I'm into it for $17,500. Many folks are calculating a 10 year usage whereas I'm calculating 50 more years on this rebuild. I figure that it lasted almost 45 years on the original interior and this time I used better products, so it should last the rest of my life and then my son can have it. That figures out to $340 per year plus maintenance which I am going to put at $660 per year so I get a nice round figure of $1,000 per year to own it. It is also nice to have permanent plates on it.
My main cost is maintaining the TV.