Hi OP- don't think that we are just getting on you, we are not.
People on this forum had this type of experience in the past or similar, therefore, they know what the outcome was and what were the mistakes and what they could have done different; they KNOW better and what the best advice is. Remember when you were a kid and your parents told you "don't do this because this will happen"? or "if you do it this way it will be better"? and you went ahead and did what you wanted anyways? Well, it applies to your situation. Again, if you do this, you will be in bad shape in the future and you will be regreting not listenting.
Walk away, sell the house and split the $$ and continue to pay your car/CCs.
Maybe one day you'll have enough money to knock on the new owners' door and tell them "I grew up on this house, i'll give you this much cash now for it!" 
Good luck!