First, there is no mandatory grind at all.
There is no paywall at all, unless you cannot wait for updates or are very interested in accessing Subscriber paid content (locked CEO folder on MC computer).
In-game, you need at most $11,000. The rest is taken care of within the story.
To simplify this, we have a cheat code free to the public: Greedisgood (use Capital "G" - it nets you $10k instantly). To enter it, visit MC room at the mansion, access the computer and click on the cheats icon.
You do not need the code if you simply TRAIN girls in the training room or work on the computer any time you have nothing else to do between character tasks.
Thank you for the praise and support. We hope you enjoy the story we are telling. Plenty of jokes, twists, turns, and surprises yet to come...