I see this is a bit of an older thread, but since safira has picked it up again, I'll echo his/her comments. Our home-built dryer is great for preserving nutritious food that will last for years. Our home one is basically a plywood box with twelve 2' x 2' screened wracks. I dry all manner of fruits, veggies and some meats.
My spouse and I are gearing up to move on board full time this summer. I'm in the process of drying food we actually eat all the time. It stores in a fraction of the space that fresh does, and if sealed correctly will last for years without much nutritional degradation.
BTW, I'm also building a solar dryer similar to the one in Sailing the Farm
. I expect to use it along the way, but I'm considering buying one of the smaller Excalliber
dryers. Our plan to keep cruising costs down is to buy fresh in bulk when items are cheap, dry the food, and then get back out to sea as quickly as possible so as to limit dock time.