Transferring USDT out of Binance.US – Need help

Need some help, please.

I sold ETH at ATH and have $20k+ in binance.US ( I bought the ETH a long time ago, and did not check up on it till too late, found out I cannot transfer US currency).

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Opened up a coinbase wallet and transferred $50 of USDT, then found out I was charged $25 USDT for the transfer. Then found out through googling, binance is expensive when doing USDT transfers. Tried XLM, but binance only lets me buy 200 of USDT at a time.

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Please, tell me if there's a better, cheaper alternative than paying these ridiculous USDT transfer fees, or buying 200 USDT a time of XLM