Stay far away from nicehash.
Its what lazy people use because they dont want to maximize profits. Plus its been hacked recently and every customer lost money with them.
Not completely vouching for Nicehash as they have certainly had their issues but I think for a 1GPU user to ability to click and forget and let it mine/algo switch is the best way to go.
Pay into the nicehash wallet then payout to a coinbase address - fee free. The risk is minimal if you withdraw every few days to coinbase. I agree its 100% not worth using them to mine to an external wallet as the balance is too big to lose