Hi Frog,
I'm a fanatic bill payer so your position would put me in a tizzy also.
But you didn't sign the mortgage. As they say what seems too good to be true usually is, and the mortgages they were and are selling have big catches to the original affordable monthly payment.
What upsets me is the banks are really setting a lot of people up..."sure you can afford it its only $$$".
If your area is like mine, I have no doubt that many of the other homes that are up for sale found themselves in a similar spot as you.
There are many landlords who would jump at employed renters with a years rent down.
As far as the realtor...tell him/her to go pound salt. Chances are they made their $$$ off the attractive sales, and they fear a blackmark on their record from the brokers and/or banks they use.
I do hope you are able to clean the slate and start over, using this experience as guidance for future purchases. Perhaps a new setting, that represents the both of you and your decisions is perfect right now.
Good luck on the house hunting...it CAN be FUN !
((((Hugs)))
Cece