Two ferrets in a tiny home on wheels

We live in a 21 m² tiny home in Oregon with two ferrets, and honestly they suit this life better than a cat would.\n\nFerrets sleep an enormous amount, so the space question is really about the three or four hours a day they are awake and completely unhinged. We ferret-proof one half of the home, open it up, and let them empty every basket we own.\n\nEverything that matters is stored above waist height. Everything at floor level belongs to them.