I've had them in the brooders inside my living room and then the kitchen for over 2 months. They should have gone out to the coop long ago, but since the older chickens would probably kill them I had to build a cage in the coop until they get accepted. And I really have doubts that they will take to all of the boys.
Probably going to end up eating most of them, if not all.

I just don't have enough females to keep them all happy.
So, if I understand what you're saying, because of the dander, etc. on your property you couldn't start fresh with a new flock?
I'm on the main highway and often find large white feathers along the edge of the property. Not sure if it's a turkey or chicken truck. Hopefully they aren't carrying and diseased birds.
I've seen several postings for Muscovy ducks on Craigslist (Jeff City) -- looks like multiple locations all over Missouri and Illinois.