I wouldnt buy more seats right now. Until the end off september, due to the new season changes, we can change ticket prices as often as we like. normally you would need to wait until the 1st off the next month for the new prices to take effect. I would try to find out when you stop selling out at what ticket prices first. Once you know this, you can figure out how much profit you make a month, maybe you make alot more and dont need more seats right now.
A good trainee costs up to a 500k or so. You can find alot cheaper ones too. I got this guy for only 70k and I think he can become a really nice player... Than with the left over money, you could expand your stadium or save the money, wait till you sell another backup player, sell him and than buy another better trainee or a really good player. I dont know how though DIV III and II are but I think the 900k cracking player you have in mind, might not be good enough for these divisions. than this money spend would be a waist...
Age: 18
Height: 6'2" / 188 cm
Potential: starter
Game Shape: respectable
ump Shot: average Jump Range: inept
Outside Def.: average Handling: respectable
Driving: average Passing: pitiful
Inside Shot: average Inside Def.: average
Rebounding: average Shot Blocking: pitiful
Stamina: mediocre Free Throw: atrocious