The $200 24 Sqft Microhouse

At about 24 square feet, the Gypsy Junker, made primarily out of shipping pallets, castoff storm windows and a neighbor’s discarded kitchen cabinets, is the largest of Mr. Diedricksen’s backyard structures.

Mr. Diedricksen’s wife, Elizabeth, is a physical therapist. They live with their children and a large dog in a 950-square-foot house about 10 miles south of Boston, which they bought in 2002 for $190,000 — a fixer-upper, of course.