[missedthecue]

Most people would be unable to get a mortgage if you were closer to the 49 year mark than not.

[mikem170]

I wonder if it would work more like Canadian mortgages, that are renewed every five years.

Or maybe like in other countries, the price of housing would decrease to a three year loan instead of thirty.

[missedthecue]

The raw construction materials that make up your home are worth more than can be afforded in 36 payments, so I doubt that's a likely outcome.