Originally Posted by
Smallwheels
His experiment has already proven that he cannot live in a dumpster. Look at all of the things he wants to add to it. What he will eventually find is that he can sleep in a space that small but needs a bigger space for doing other life activities.
He might consider attaching an awning to the dumpster. This would give him a shady space to hang out in. In fact, an awning would improve any of the options you mention: camper, van or small trailer.