Fantastic. Thank you. Refrigerators! Yes of course, clever. I will tinker with that.
Yes, that's sadly the nature of a tiny house on wheels most of the time. I think the ones from Tumbleweed weigh around 3 tons, an therefore require a powerful car to tow. That's why I've been considering a light-weight construction, but that of course adds to the problem. To counter it best I can, I plan to have some mass in the form of a RMH in both the house and the yurt (with as little barrel exposed as possible to first and foremost store heat), and in the last mentioned I was pondering having water tanks, not on the RMH (don't want to create steam) but in the room. To save space, maybe they can be placed inside furniture. Like under the sofa, for example. I've got the impression that water stores heat effectively and so far I can't think of any big disadvantages with this idea. I could also add rocks around the RMH. As for applying that in the house, well, that depends on how much it will weigh when it's finished. A more expensive trailer probably maxes out at 3-4 tons so I wouldn't tempt it. In the end I'm limited by how much mass is practically sound to move around. I would like to be able to move everything at once, to minimize expenses. Even though it probably has to be split in two anyway, since the yurt weighs several hundred kilos.
Your cottage is perhaps the best example of storing heat I've ever seen. I've never seen that in such a small building. Absolutely amazing, and very inspiring. I would without a doubt go that way if I owned land. That gives me an idea! I could heat the water that goes in the tanks with solar heaters. They're cheap and easy to build, and also portable. If all should fail, I could always move the thing somewhere warmer. It is after all - at least in theory - mobile. I wasn't planning on taking it around the world though, it's more a quick way to create my own cheap home, which I can move if I have to (when my 6 months without a permit is up).
Thanks again for your input.