It likely doesn't matter. This is Mr Prep Time. He's likely been funelling millions a month away for decades into a super secret account for just such an occasion as he is outed and has no chance of regaining his wealth/resources. It would be trivial considering in settings like the DCAU he funded the fucking Watchtower by having it's costs hidden in the WayneTech Space (da fuq?) budget. Bruce has as much money as the plot needs him to have.
He said it himself. His super power is that he's rich.