Anyway, the objective is to make money.
Best way to make money? Cheat or develop porn games.
Secondary: buff up, buy a brothel, a car, buy a farm (and cheat through the training of the slaves), buy a villa and fully upgrade it, make friends with drug dealer and cop boss and grow a collection of slaves and whores (maybe kill Mabuta too, just make friends with a merc, make them a hitman and arm them up).
Could also dabble in boxing but that's not that rewarding, football even less so.
And tip for porn dev, the money made is rng betwen 0 and the number of games made in total times 100.