That sounds good, I can see how it can make the game more interesting and extend it further. I guess after the first year though, once you get a girl to 100 fame, and if she gets 100 constitution/you give her items to get there, you'll quickly raise the capital to rapidly progress?
I don't like progressing quickly too much, so what I did in my latest custom 'rules imposed' play was:
-Not buy constitution raising items, or pretty much any items really. Just the clothes that have minor bonuses, to sort of set a 'uniform' of sorts. Also so you still use some of the items, and burn up some cash.
-Not go into the catacombs, for the same reasons you outlined, and that money also comes easily in there. It's annoying because I haven't set the items to be obtainable in the shop, though that's an easy fix. Although, it does make serious afflictions a real consequence from neglecting/abusing girls, so if you like that sort of option, leave mind fuck/fragile/retarded stats uncureable. It'll make you think twice about how you value them and your income stream.
-Start out with one slave girl, and only use her daughters to expand girl-wise. A slow process, but you could also make use of her daughters for the same reason. Just use customers to do that process, or yourself if you have no qualms lol.
So as you can see, it's slow going early on, and progresses slowly. I also like doing these last two to make it more difficult.
-Have no gangs whatsoever. There's risk in whoring, and coupled with the uncurable damage that may happen, (also slows down the birth rate, rather brutally) it makes the next point more advantageous. Alternatively, config file to raise the rape possibly.
-Once you get enough girls, change your brothel to a bar/gambling den. Lower income further slows down, but keeps more girls 'intact'. You could also just have them be massusses in the beginning to minimize risks and income. I like how the sex rules of the brothel also apply for these jobs.
Some of these you can do by config file alteration, but I do like to have more regular play style games able to load without swapping config/item files.
I also played like this:
-Only employ 'damaged' girls. Girls that have addictions/negative traits.
-Cure them with the income they generate, and then make them 'Free girls'. If you have too many girls, release them.
-Usually I also make these girls work in bar/gaming, to lower incomes and also if they're damaged, is it right to make them work (solely) as whores?
-No gangs other than for guarding. You don't want to be receiving daughters from businessmen.
This is more of a 'good' play style, and also works on burning up that capital, while keeping income lower.
-I usually keep the girls that are 'uncureable' because their cure items are in the catacombs, which I avoid. Again, the alternative way is to make a shop item/change the existing item to be shop obtainable.