Thanks for the advice, but I dont think he would ever take it. They did consider something similar to what you advise in early 09, but decided not to. The resulting bounce since then has convinced them to hold on till they can get out for even.
There isnt too much room to expand. I dont understand all of it, but it was gonna cost him like a quarter mil+ to put a second story on it. An addition is possible, but not cheap any way it goes.
As for the Condo, they have decided to just suck it up and take the monthly loss. They make great $$$, and if they really wanted to make it up, they could just cut back on the lifestyle alittle. But they dont so they have chosen to remain stuck. Path of least resistance and all that.
It was just an example of how family housing inheritances can sometimes not be optimal.