I probably don't get to go out as much as most folks on this forum but last year I found a ronco dehydrator at a yard sale. It works with a 100w light bulb has no fan but has trays etc. I started with bananas and apple slices that seemed to work o.k. I tried other stuff that went into the trash. So then I boxed that sucker back up and tried the oven like so many have posted here. What a bunch of work and time spent for the results. I don't think I'm saving money either. I ditched the whole process and use commercial products that I find acceptable and better that instant grits (which I still use) and mac and cheeze. My local Bass Pro has 2 varietys and enough selection plus most grocery stores have many items that you can combine to make freezer bag meals, ala Sarbar.
I bought my cheap dehydrator for $5 and that's about all it's worth if that. If your going to get into it at all, spend the money and buy something decent. tired
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Enjoy your next trip...