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ExpandPaypal is the only option because it's world wide,
Since when?
Papay is highly risky and more so if you need fast cashouts.
Binance is also worldwide. I doubt that your brand new shops sells worldwide and in the way you believe it'll go.
ExpandIt's simple to put in phpMyAdmin, run sql and done.
Then he can register your store in ps_accounts.
Better to mention to do a back up before handling the database, specially y he never has donesomething like that.