We import and sell reclaimed architectural building materials from Europe - think antique stone flooring/mantelpieces/doors, etc.  

In case of default the promissory note converts to a performance deed and is recorded giving seller or heirs the right to reclaim the property. 

If after my 6 yrs and I am no longer in the military, if I default at that point the seller simply forecloses on me, and does a little happy dance as they reclaim a property that has had 6yrs of mortgage paydown and 6 yrs of appreciation.