Do some regional centers charge a lesser fee from investors who approach them directly as opposed to through an agent/advisor? This is because in the first case, they don't have to pay the commissions/finder fee/advisory fee/or marketing fee to the intermediary i.e. less mouths in the transaction. What regional centers do that?
The list of all of the federally approved Regional Centers is on the USCIS website. To find out more about the Regional Centers you will have to do some research yourself.