There are a ton of aspects about this game that I absolutely love, both from a setup and a sex standpoint. But there is zero way I'd ever be able to progress through it without cheating, because there are aspects that are so far over my head that I just do not understand them with regards to the business and raids.
At first just work day to day using money to increase MC's stats.
You need a lot of money to go after other brothels and districts so just take your time building up cash.
Don't worry just keep playing day to day building up that cash.
Once you get about 100 million build up then use this slowly.
Keep your staff 1/1 and upgrade 1 at a time on "Grade" until you can figure out how to use it.
As you can see I'm at 100000 and I am making 100's of billions for it.
Just slowly move it up and just take your time on it.
As for "Raids" you need 1 good support stats and then your group of fighters.