Quieter alternatives for propane furnace in extreme cold

JoeChiOhki wrote:
How deep are your pockets? Hydronic heat would be definitely quieter, but you'll be investing a few thousand to upgrade.

WesterRoamer on this forum several years ago, did a detailed piece of upgrading their unit to an espar hydronic heating system to replace their original furnace.

I somehow missed this comment in my previous post.
I would say I am willing to spend enough to make this happen, but I don't expect to spend tens of thousands. I hope to be able to manage all of this with less than 10K.