30' yurt + insulation layering

[Aaron Harris]

I have a 30' yurt on a 2-by T&G platform with a dry bermed, insulated, heated walk-in "crawlspace" basement with barrels of water as a thermal mass. (So I'm not insulating the floor).

I opted not to pay $3400 for reflective bubblewrap in a liner.

I think my solution will be building 'pie pieces' out of the following.

I can get the reflective bubblewrap for about $500.
I can get 1/8" of wool felt for about $800 per layer.
I can get 1/4" wool felt for about $1600 per layer.
possible white tarp or other vapor barrier?
natural cotton muslin on hand for inner wall appearance

I could supplement with foam panels between other layers.

Now, Air gaps are a good thing, so I think 2 x 1/8" will (always?) be better than 1 x 1/4" and I know I want to control for condensation, perhaps using the reflective as a vapor barrier.

Which layers would you include in what order? I'd like to keep the cost under $2500

Any particular overlapping strategy between roof and walls other than the roof felt outside wall felt, except for vapor barrier that wants to ceiling to weep inside wall... ?

Thank you so much!
AH

PS I want to thank hierony and others for their pointing me to wool products and felt.