More great advice from 4plex. I can only add something I read from Susan Bies, Fed Reserve Governor: expect CPI to increase, bec. as housing prices drop, rents go up.
Did you try a google search on housing values and rents? Or the Federal Reserve website?
Also wonder why you wouldn’t just sell the house now, and buy it back for 1/2 the price in 5 years. For the money you’ve got into the current house, you can buy 2 rentals in 5 years.