There is obviously a risk that the seller will demand to release the escrow once the transaction is completed and the OP may not pay.
"you'll control the release button" is nonsense, escrow is supposed to protect both parties so if the seller delivers they are supposed to get the money. The buyer (or buyer's surrogate in this case) can't just deny it.
The most generous interpretation would be that the OP is trying to buy something, flip it, and then repay. Otherwise it's just plain scam.
If i ask someone to give me a loan to fund Escrow, to get 20% profit, do you think he would say "Okey i trust you, here's 5k"? "you'll control the release button" is nonsense, escrow is supposed to protect both parties so if the seller delivers they are supposed to get the money. The buyer (or buyer's surrogate in this case) can't just deny it.
The most generous interpretation would be that the OP is trying to buy something, flip it, and then repay. Otherwise it's just plain scam.