That'll buy him a $40K car, pay his $15K tax bill, buy him a $2.5K wardrobe, and, depending upon his maturity, allow him to kickstart a retirement fund. Then he's gotta go work on the field year-round. Under $1K/month for short-season A-ball plus roughly $20/day for meals while on road trips. Next year, the full-season A-ball salary jumps up to $1,050 - $1,100/month.
Players drafted in rounds 6 - 10 have a 20% chance of making the big leagues.
Minor leagues are about grinding, developing, and not getting "weeded out".