Are you serious? lock yourself out of the market for 7 years? Look around for a decent vendor financier who's not a shonk and will look after you. Steve Mcknight used to offer this sort of a deal – not sure if he still does. I also still have people that I started financing 10 years ago but many have been able to re-finance meanwhile. had they waited they'd have missed the boat and missed the security of having a place that they belonged to