Realistic savings from a 50-year mortgage will be non-existent, as it cannot be offered at the same interest rate as a 30-year mortgage without government subsidy or being factored into a higher purchase price.
"The realistic savings would be pretty much non-existent because there is no way that they could offer a 50-year mortgage term at the same rate as a 30-year mortgage term unless it's subsidized by the government or it's just baked into the purchase price."