It might make sense for you but it narrows down a lot of potential buyers, not only do you have to find a buyer who wants to pay with crypto but you have to find one that has this amount now in crypto is willing to let go of it. Buying through a mortgage dealer would make more sense to anyone including somebody who has coins because if he is that heavily invested in crypto as he obviously expects the coin prices to go up.

My personal opinion is that waiting for a client that first your criteria is going to be a long wait and it seems like time is not something you're willing to spend around. You should reconsider those costs which I don't think are that high compared to the possibility of never finding a client.
Why do you think those websites either close down or are a ghost town now? Because they have offers but no actual clients.

All the sales for crypto I've seen to date have been through a real estate brokerage agency or realtor so you might try this route.

That being said, loopnet might be an option, there are people selling commercial estate and they do allow you to mention you want bitcoin
https://www.loopnet.com/Listing/427-S-Main-St-Cedar-City-UT/21189801/