As always, consult an attorney for complicated issues. It's not clear what you're trying to do here. You want to drop the house and gain rights, seems like those two don't go together. You want to take over the mortgage then do a short sale, I think. If you can't afford the house you won't be able to take over the mortgage.
On a side note: Does renting out a property you are not longer making payments on, nor plan to, feel like the right thing to do? Seems as though it's taking advantage of the system here. Why should you benefit from monthly income on a property you are not even willing to pay your own monthly payments on.
Contact an Attorney. You may be able to do a Power Of Attorney or something similar.
Shanna Rogers
SR Realty http://www.RealtyBySR.com
