You'd have to have buy-in from some lending institution, and presumably they'd be the ones to make the user facing documentation/education to fit their clients.

You'd have to have buy-in from some lending institution, and presumably they'd be the ones to make the user facing documentation/education to fit their clients. However if it's only one bank we're right back to where we are with PayPal, where there's only one provider facing consumers / sellers; instead of competition to drive the markets towards actual efficiency and liberty.