Just so I can get this straight. You already own a house, but it is underwater or at a breakeven point. You want to buy a 800k house with 10% down. You could put more down, but dont want to liquidate more assets to do it.
Are you trying to sell the house you already have? Are you gonna walk as soon as you get your nice house?
Couldnt you compromise and get your house down to the 600’s. That would make your 80k into 15% and make your loan into jumbo conforming territiory.