Platform ideas?

[Yurting]

I was wondering about platform ideas. I've kinda searched on here and haven't really seen much about what I was thinking specifically.

I'm thinking about a 20' - 24' yurt. It will be in the Rocky's at about 8000'. Windy and cold mainly in the winter, but pretty good snow also. I want a sealed and insulated floor, to cut down on drafts and

heating

cost.

How much of a foundation/footers are required for these sizes?

Does wind go right through these things in the winter?

How much is

moisture

an issue? I've seen a few threads on condensation and

moisture

issues.

I've been thinking of doing concrete footers below frost line, but those will be pretty difficult with the rocky soil. Plus footers would be hard to remove if needed. How effective is just placing the foundation on surface level, or is it possible even??
I was imagining a 4x6 beam support, with 2x6 blocking for added support. I want to insulate the floor, either with tyvek and fiberglass, or preferably closed cell foam sprayed in. I was kinda thinking of putting t/g flooring plywood ontop of the beam and block system, then building a 2x4 truss with the

insulation

and another layer of plywood on top of that.
Is this overkill?
Or I could attach the base layer of plywood under the beam/block system once built, and add the

insulation

, and just use that single layer of plywood as sub-flooring?
I want the

heating

cost to be as low as possible, obviously. Haven't planned much, but thinking about propane, pellet, or wood stove for heating.

The yurt will be used as a bedroom essentially, a hundred/two hundred feet away from the primary residence. Really only planning on electricity being run, due to cost and any legal issues. The county is lax in building code, but not sure about "2nd residence". It would have no sewer, kitchen, or running water. No building permit or inspection is needed.
I don't want the platform too high, and want it kinda basic in shape/size, but well insulated. I'm just trying to price building materials, so I can get a good idea of total cost. Everything I've seen on here is un-insulated.