Just retired? You better get a hobby going fairly quickly. Some retirees can't find enough to do after they have quit their jobs. Some have their wives tell them to quit following her around. Then there are the guys that can't stand it more than a month and go to Walmart and ask for a job as a greeter. Hey, nothing wrong with that, I might have done the same thing myself, if I hadn't found a worthy project............a teardrop trailer.
So, I suggest you get started right away, get that trailer frame. decide on the shape and material and make the sweet wife happy, since you are no longer underfoot. "Honey, will you come in here and dry the dishes"?............No, I'm working on my teardrop trailer.

Roly