This board is for services paid in bitcoin only. As you are willing to pay in usdt, you have to move this topic to the altcoin marketplace here: https://bitcointalk.org/index.php?board=161.0

Also, it's better to escrow to escrow the funds pool dedicated for this offer. Use one of the reputable escrows available here in the forum. Here a list of them: https://bitcointalk.org/index.php?topic=2439910.0