If someone has played some games of the suikoden series, you might have realize that one of the most interesting aspects of the series is castle upgrading. I think it would be a good idea to implement something similiar in WM, and maybe add a politic element. What i mean is to use the player house, not a Brothel but as a landmark of achievements, and the perfect way to curb overabundance of cash.
You could start with a shack->small house->Medium house->... ->Mansion->Castle
And require a number of goals and cash for each upgrade. Another option for the player house could be to micromanage training, And need to upgrade forniture and training materials for higher levels or quicker training. Of course dedicated training should work independant from bulk(brothel girls) training to prevent the game from turning too overwhelming, but it would be good to use hand picked(unique girls you like) and trained girls for special tasks, Maybe keep some for your own mansion to work as "maids" or train them to be bartenders and matrons, giving them bonuses over the hired ones. In other words become your personal mistresses/right hand women/elite workforce maybe add assassinations attempts against you so you can train some of your girls as bodyguards/portable sluts.
Another advantage of it would be that it could be a place to keep your kids in order and to decide what to do with them, it would be a good idea to be able to hire or train girls as teachers and combat trainers, so you could put your male children to work in gangs or to manage your businesses, the same with your daughters but adding also the possibility to marrying them off to merchants to gain more businesses, and to government officials to decrease law suspicion on you without requiring bribes. Also you could make captured businesses managed by your children to be more productive than those that are not.
It would also be good to be able to add a mad doctor lab as an upgrade to the player house so with enough time and cash you could change the physical traits of the girls, giving more control of the traits of an specific girl without having to depend on endless amounts of items which even right now are quite too many. (hell in my game i killed all the cures and the crappy healing cream, combined them all and renamed them panacea)
Also i think it should be good to curb the amount of info in the summary screen, maybe make a short summary and a long summary, in the short one put just income, events that need your immediate attention(births deaths and low health) and another with the full summary as it is now.
Anyway I hope any of my suggestions were useful.