Teach Nollaig on Facebook has a collection of albums showing the construction of his tiny house on wheels. The photos are informative and beautiful to look at - he has mini tutorials on how to make a woodburner water boiler (last photo), a gas-bottle stove, and.. well, his entire caravan!
Little things to delight as well, for example the use of raw, untreated sheeps wool for insulation. A wee bit risky as the lack of borax means insects or mice may move in… but sheeps wool’s insulation properties don’t change when it gets wet. With just a breathable membrane and then cladding on the exterior and cladding on the interior, the lack of ply or OSB sheathing makes this lightweight and more affordable.