If I could advise Nick, I'd tell him to take all the money he has earned over the past two years (probably around $500), and pay cash for a nice home (I assume he lives in an area where house prices aren't too bad), and retire from bodybuilding. Drop down to trt dosages, maintain what muscle you can through hard training and lots of protein, stay lean, and just do online personal training from now on.
The kid is already set up for life if he takes that approach. I'd imagine he could easily get a hundreds of clients, enough to love very comfortable while saving for another property to buy as a rental.
He would maintain a huge amount of muscle, could get healthy and focus on being aesthetic and young and good looking and fit and happy, build a family, etc.