This is the BunKaboose by EcoCabins in Colorado.
The BunKaboose, designed by David Papen and Darin Zaruba from EcoCabins, was first envisioned as a cross between a caboose rail car and a rustic bunkhouse. A uniquely original tiny house with rugged style, classic appointments, and superior quality craftsmanship, the 20’ model with a 4’ deck is now available and the 24’ model with a 4’ deck will be released soon. This home features a quaint rustic metal deep soak bathtub, two lofts, an electric fireplace, and ‘beetle kill pine’ interior walls, trim, and floors.
Related: Morrison Tiny hOMes Now Available by EcoCabins