There are lenders that do this junk too in that they take due diligence fees of 20,000 on commercial stuff or more and then find reasons not to do the loan. (biggerpockets.com)
However, many factors do charge due - diligence fees in order to investigate and qualify your accounts for funding after initial review and acceptance. (factorfunding.com)
You'll also have to pay for closing costs and due diligence fees. (valuepenguin.com)