Actually.....something i'd have to look into more....but you can file for joint ownership of real-estate with a spouse, with one person spending more than 50% of their time on real-estate while the other dealing with another business or employment...then any passive liability from the real-estate end can become tax-writeoffs against he business/employment end.

This is of course, assuming that marriage plays a role in the ability to arrange such joint ownerships.