Earlier quoted context omitted.
His parents had to put up their home for the bond.
Had to give up their home for the bond? edit: i.e., it is far more likely to be a 25M home than a 250M home, because I've never heard of a 250M home.
“Put up” is not “give up”; it is to offer as collateral, that is, they got a loan secured by a lien on the home.