Allwood Outlet has a DIY cabin kit at Amazon with space for a bed, kitchenette, and bathroom, all for less than $20,000.

The tiny home trend has taken off in recent years, but it's not the only alternative to home buying for those looking for something less traditional and more budget-friendly.

The waterfront prefabs are self-sustaining, says the designer, down to dry toilets that turn human waste into soil ...