Responses
my guess is either the money he earned ( from his job with the prof and the bank account of the of person and maybe some of the allowance) that he was gonna give to his dad or he found out the password of the bank account/safe
Either from the work from the professor or the savings he had
Remember how that one soccer friend gave mc a check from his soccer deal payment in the earlier chapters? I believe it's that money.
Where the heck did he get all that money?