I've only had a small amount of experience with the tavern so far but from what I could tell it looks like income is mostly dependent on reputation which you get by actively gambling and/or carousing there yourself (which costs time). Maybe the stats of your girls matter if they have stuff that's relevant though. None of mine had high enough corruption or low enough willpower to work as prostitutes so I suspect turning on whoring probably didn't do anything. I just had a bunch of randoms with zero training working there.I am actually thinking of high class escorts for the people who prefer the prostitution playstyle. Have a girl who only entertains one client per day in a safe environment (your Tavern) and her client fee scales off of her prostscore, beauty, charisma, dex, performance, dancing, acrobatics, her xp in vaginal, anal, and oral. She has to have high prostcore first to even qualify for the job though.
My tavern was only earning about $80 a day with 11 girls working there last time I looked. Not exactly raking it in, especially considering the build/upgrade costs. Kind of curious to know what sort of income it produces with properly trained prostitutes working there and high reputation.