Help ! Wholesaling to end buyer w/ 100% financing

have a buyer ready to go who is using 100% financing.

I want to wholesale a property to him.

I am using an agent to make offers.

Will I have problems with his bank doing a wholesale deal?

What cost would I have any closing cost or commisions paid?

What is the best way to do this type of deal ?Assignment or double close?

Is there a way to explain or prove to my agent that this is legal?

Should I have a financing contigency

Can you point out any important information that I need to do to get this deal like this done?