Need HELP understanding a double close

[Jose Rosado]

been marketing my area via Direct Mail and got a few leads. I have a potential "Home run deal" on my hands and need help understanding the double close route of a wholesale deal. Hoping for some experienced answers as I am learning and trying to do things right.

Is it possible for the buyer to fund the cash for the transaction?

does the buyer have to be present at the A and B closing?

do i need an attorney?

if the buyer does fund the transaction, how do i go about incorporating my fee?

is there earnest money involved if the buyer funds the transaction?

would i have to give my own earnest money to the seller?

please help... i need answers! thank you in advance.