Alright thanks for your detailed answer! Most people I know have their kiln in the basement, but yes, I cannot imagine that the kiln cares if it is 10 or -10 degrees as long as it is possible to turn the kiln on. The differance between room temperature and max kiln temp is so large anyway.
Yes, the ventilation is a big worry. In the summer, I can open doors and windows, but in the winter I would have to vent the kiln out of the chimney somehow. There are two doors between this kiln room an living areas - BUT one has to go through the room to get to the bathroom and with the opening and closing of doors the air would enter living areas and bedrooms. Again, I don't fire THAT often but it has to be possible to live and sleep in the cabin during firings. Do you think it is possible to ventilate a kiln enough for this use? Earlier I have had my kiln in an industrial room with a window, no other ventilation. So I am absolutely unqualified when it comes to ventilation.
Yes, you are right. I have seen a gas kiln inside, but not inside a house. I just thought - I have a chimney in the room, sooo maybeeee. But I would need years of planning. Just curious to hear peoples initial thoughts.