Where is more information on this? Other than doing an 80/20 loan.
Jive, I thought you had an accountant on your payroll, why asking the forum for advice? . I'd never get an ARM, too much risk and interest rates are so low, its not worth it. Who knows when they'll go up. They keep saying they will go up soon but that's been several years with the same story. So no one really knows.
Along those lines to the OP. Are you looking for a 'forever house' or a 'just for now' house?
It took us 18 months to find our 'forever' house. We got a good deal and I think a very good interest rate for the time. The advantage of buying now with a really low interest rate may completely blow out of the water 20G's you might save on a house over the loan repayment period.