Now to make this for the poor and homeless. It's doable. Low cost, Mass production assembly line like the Model T Ford. Sold in high numbers make a little money on a large number sold. Use city "sweeps", tax money to purchase them as a personally owned property to keep stuff in and safe place to sleep etc. Off grid solar panels on the roof. 🏡
We could make out of PVC. Have a 4 wheel bike project to see how you could make it. That is my next project that I plan to do. Removable wheels no need for jacks.
between 300 to 350 for prototype. If it were for production would go aluminum frame to save weight. It's a ebike trailer. Will use a trike to tow. plus trailer will have brakes too.