Hopefully, every bank is on to his scams at this point and would require 3rd party appraisals.
I would be more concerned that he would use it to launder money. For example, he can’t use campaign money to pay his civil judgment, but his campaign could “rent” some space and other services from Trump corp for exorbitant amounts to raise the funds to pay the loan. He has been using the scam to launder Russia mob money since the 80s.