Congratulations, I hope you get the house. Lets see, you can host quilt retreats. You can put a long-arm in there somewhere. Have you ever thought of short-term foreign exchange students? They have some as short as 3 days or a week or two or three.
You can fill all the rooms with fabric..... Invite other quilters in for a party from other areas of the country.
I'm sure that you can come up with more ideas!!!