HI guys, heres a easy way to earn lot of money at owner mode, i hope this help you
Back up save.
Go to casino
Select roulette at 100
Place max bets on number 1-12
Hold circle and tap the stick making sure to fill all possible bet points from 1-12 using up 200k+
If it lands on 1-12 you win between 700k to 800k,
You also unlock the premium ticket for winning so much.