Can a loan payment be due before the standard 30 days after consumation? Example: Loan Closes on 25th of the month customer requests their payment be due on the 10th of each month and requests it to start the following month, knowing that they can go out 30 - 45 days but chooses not to. Loan closes and 1st payment is due 15 days later.

Absent a state law to the contrary, it's up to you. Also be aware of any investor, insurer, guarantor, or other third-party considerations. Fifteen days should be plenty of time to set the new loan up so it can be serviced properly when the first payment is due.