I would like to do the same! Could you please provide more detail on sourcing materials and the construction?
I think I looked into it recently and we spent something like $700 on materials.
But then you just put down the first blanket, lay down a layer of the batting (I don't remember for sure, but I think it maybe came in queen size bats already from where we bought it), and then repeat.
We stitched around the outsize with yarn using a baseball-style stitch to keep everything sort of fixed in place.
Here's a picture: https://files.slack.com/files-pri/T03KPRY1A-FBT1180P5/wool_b...
Is it propped on anything?
That would require a write-up.