There's minimal evidence Maya's family is wealthy, much less that they have influence with B&R. More importantly, the MC has never heard or suspected any such thing, so there would still be zero reason for his panic even if it turned out to be true.
Beyond that, though, by that logic why bother going to see Sage's father in the first place? If the concern is that B&R would back up Patrick's ultimatum, surely they would refuse a new loan no matter who granted it. Stephen being her dad is actually good news, since he's the person you'd need to convince.
Sorry, but as of right now the MC's blue streak makes no sense unless the MC had an affair with Jade.