That four-yurt idea sounds really lovely, actually!
I've been bitten by the yurt bug, too....
I have this theory that sooner or later everyone on MDC is.
We are likely moving to a rural area where dh is working now, sometime in 2011, probably. The final decision depends on many factors and we'll be pinning it down this summer.
We're in Canada also, looking to move to a location about 53 degrees north latitude, so can get pretty chilly in winter. -30 C is not uncommon, -40 happens at least once, most winters.
What got me thinking about yurts is looking at rural and very-small-town properties with tiny old farmhouses, like 600 square feet, which I would consider too small for a family of 2 adults and 3 soon-to-be-teens. However, these properties are much better priced than the ones with bigger homes. I have been thinking of looking at properties where the farmhouse could be used mostly as a cookhouse/bathhouse/laundry house and a yurt or two with connections could be put up as an extension, to provide bedroom, living room, and office space.
I, too, am attracted to the idea of living in a really interesting home. The standard cheap and easy housing options out here are mobile homes and RV trailers, which can actually be really comfortable, but which sure do not have the beauty, fun factor and even the mysticism that a yurt seems to have.