Alright let's start over:
First, just say no to RenPy. Linear stories have no replay value and you'll end up having to cram in fifty different scenes all based on specific fetishes that only 5% of your audience wants. Use some other game engine instead to make an actual game instead of a glorified visual novel.
Second, here's your game: Your MC has read tales of what life was like in the Olden Tymes, when sheiks would spend all day lounging around with hookahs full of hash and watching their private harems of dancing girls entertain them all day. This is what he is going for.
But... there's a catch. The modern world frowns on such shennanigans, and the Powers That Be will try to stop you. You have to keep you clandestine sexual encounters secret because being discovered can cost you your head (literally). So as you seduce your way to the top you have to keep on watch for suspicious fathers and husbands who must preserve the "Honor" of their secretly slutty women. Cuckhold rich old men, seduce their daughters and convince these girls to shift money and influence your way as you do.
You'll basically be making money to fund this operation as a giggilo, giving these women the satisfaction they aren't getting at home. You'll also be brainwashing them into going along with your fantasy and twisting them into being part of your secret harem. The end game goal is to acquire enough money and influence to become a real VIP in society who's allowed to have half a dozen wives legally. Or even get your own private island or yacht where you can keep all your girls.
As far as mechanics go, you've got your money stats, influence stats, sex skills, your charisma (for bullshitting people), etc. Start off in some run-down shack with a donkey for a ride and work your way up to the sheik palace and the solid gold Rolls Royce. Then do the Porn Empire thing and have 99% of the girls be randomly generated while maybe 3 or 4 of them are premade characters with their own (short) stories as "boss level" challenges used to advance to the next tier.