There is no way the guy can scam the OP since he is putting his own money on risk and isn't asking OP to put any of his money into the business. The thing is, the other guy might be transferring the money from an illegal source and doesn't want himself to get tracked for its usage and that is the reason why he offered a guy, completely inexperienced and never known to him, the job so that he gets the business going but no harm should come to him in case something goes wrong.