He wouldn't even win his weight class in a state level show.
Not to be overly negative, but let's be realistic here. He is 21 years old. Obviously, as we all agree, he does not possess what it takes to become an elite top tier BBer that can rely on sponsors, placings, guest posing, schmoeing, etc... The supplement industry is in shambles basically as everyone is afraid of becoming the next PJ and the gov't ass fucking them in broad daylight. The peptide industry has crumbled. Selling roids (or even being a remailer) isn't as lucrative as it used to be since the gov't basically made shipping them within the US anonymously impossible. (A DEA prosecutor here has told me that being a remailer has a shelf life of 6-7 months now days before you attract attention. These people that do it for a couple of years are already well known in the circles and they are just following things up the chair trying to make a better case against the bigger guys). Becoming a TV actor or WWE wrestler is out of the question. (at least where one can be successful at it).
So what does that leave this guy with? You can make decent money as a trainer if you have some kind of credentials behind you. My buddy Paul Baker was one of the biggest guys on the pro stage at times, but never won anything. (couldn't stop using a pound of Caribbean spices on every meal during his dieting phase). After he came out of his coma (not related to roids or BBing), he came back on HRT dose, drop down in weight and looks great. Still bigger than the majority of people in each gym and better looking than 99% of other retired pros. He makes a nice living as a PT, but he is the exception to the rule.
Unless this kid as rich parents or schmoe to mooch off of, he is setting himself up for long term disappointment. Hope he is pursuing an education towards a worth while career.