The problem is that you need real property on which to site the homes. A building lot can run from $20k or so on up, depending on location, location, location. The permitting process usually runs ~$5k or so, more than the cost of the printed tiny home.

Printing tiny homes doesn't even address the primary issue causing homelessness. As a builder, I am intimately aware not only of the dollar costs or property and permitting, but the tangled red tape invariably impeding any construction.