As reported in the Shetland News, here is the the wooden tiny house on wheels (pictured above) belonging to Karen MacKelvie, a RSPB Community Engagement Officer for Scotland, on Stromfirth. It's 20ft x 8ft, with toilet, shower/bath, woodburning stove, and built by Caithness-based craftsman Al Whitworth with unique features including a wooden sink carved
from an old dough bowl. There is sheep’s wool insulation on the floor and Kingspan
offcuts in the walls. Lots more details, including how it was transported, at the links above.