I lived in a yurt for 2 years in the mountains and loved it.
It was very waterproof, very well-made, and overall just a great space to dwell.
I think we had almost ever optional feature on ours including snow-load roof kit, door with window, extra windows, etc.
We didn't have kids then but two of us were comfy in the 18 footer (or was it 16?
We had outhouses and a building with a kitchen and washhouse so that took care of us needing to build them into our house although we did have a small cookstove. We had solar panels and things were pretty simple.
No bad experiences here.
I do recommend putting a skirting around the floor if you are on a platform. Ours was insullated from floor to ceiling and still it got kind of cold in the winter, a fire was ALWAYS necessary in the winter. We considdered putting in a gas heater and maybe even a propane fridge when I got pregnant but then we moved to town into a regular house.
I think the cost of our yurt would have been pretty high around 11,000 or something but it was donated by pacific yurts when a fire hit the mountain and burned most of the structures.
I do think they are worth the money (pacific yurts are the only ones I have experience with) and I know my husband could build a permanent structure that is more insullated for the same price or less because he is a builder. A strawbale yurt with load-bearing roof and mud floor could be pretty cheap if you were able to build it yourselves.
There are plus sides to both choices and down sides to them too. yurts are portable but also don't last forever. I think their roofs have a 20 year life or maybe 10, it's been a while since I researched them. I remember the mice got into them quite easily and in the winter we had to build insullated widow coverings or else cold air leaked in.
Good luck with whatever you decide and keep us posted.