I removed the word "cheap" from the title of the thread lol. At this point I figure if I'm going through the work to put together a shed I might as well do it right and make it permanent to the house. I haven't talked to my neighbors yet but from across the street it looks like most of their sheds are on wood foundations.
You can get one of those 18x21 metal carports and then you can go to Lowes and get more of the same type sheet metal and enclose it yourself and build your own doors if you want some on it.