Units that stay on wheels and can be towed to another site.
Where they can be lived in full time depends on the local rules for park models and tiny homes on wheels.

Zook Cabins · 300 sq ft · Starting price $45K.
Compact gravel pad or concrete slab recommended · 100-amp electrical service, garden-hose water connection, septic/sewer connection

Zook Cabins · 400 sq ft · Starting price $55K.
Clearing and leveling the ground, utility access · 40 Gallon Electric water heater, 100 AMP panel, RV hose connection for fresh water inlet

Zook Cabins · 400 sq ft · Starting price $55K.
Customer responsible for final leveling, adjustments, and skirting; must be accessible by semi truck · 100 AMP exterior panel, 40-gallon electric water heater, dual head mini split units

Cocoon Homes · 170 sq ft · Starting price $56K.
Studio style home with full kitchen, bathroom, washer/dryer unit, elevated bed nook, and Mitsubishi mini split, built on a custom steel chassis.

Cocoon Homes · 240 sq ft · Starting price $68K.
1 Bedroom Retreat, 240 sq ft, 24'x10', factory-built on a custom steel chassis, includes kitchenette and 3/4 bath.

Cocoon Homes · 300 sq ft · Starting price $78K.
True one-bedroom, one-bath home with full kitchen, vaulted ceilings, oversized windows, hideaway counter, and built-in laundry.

Cocoon Homes · 400 sq ft · Starting price $89K.
Full-time living home with end cap kitchen, laundry capability, vaulted ceilings, and large windows.

Cocoon Homes · 500 sq ft · Starting price $104K.
Two fully enclosed bedrooms, oversized living area, vaulted ceilings, full-size kitchen with multi-use island, full-sized bathtub or shower, lighted vanity.