I don't know where your idea comes from. You move your funds from your local money to BTC, then to USD, and don't have to use Tether USD. With P2P marketplaces you can do that fastly.
Thanks will check P2P market out. Wanted to use tether since want to avoid volatility of BTC during the transfer.
What's the reasonable premium of buying in P2P market vs exchange? That's would be the transaction cost. I would expect BTC or tether price higher in foreign exchange controlled countries like China or Argentina.