It would be nice to have a trick to increase money!
a question how to unlock Nicole... Can't find it?
For money the best payed job from slaves is Golden Dragon which is Rachel best suited for followed by becomming a professor at academy for which your slaves need either academic or science on 70.
You should try to get Rebecca because her unique title is increasing investments you made but do not make the mistake of following GrimDarks advice and marrying her because with the trait revamp to title now it is a duty instead of a passive effect which makes miss out of steward or the effect.
For getting the girl who is most suitable to become your wife so she works as you steward for money gain you need to go to a slave auction requireing you never went to one where random slaves are auctioned away before because the first random slave is guarenteed to be the Storm Child who is actually another Story slave and is getting up to 120 intelligence making her most suitable to be the wife.
Once you have access to Crystal Hills also buy May-Linn because she is most suitable to be your gardener which will in the end cut costs for food supply.
Also try to get Armand from the Bank to make him an accountant and Bud Walton from Weapon store if you are at the start because Bud is one of the 6 Mercs who uses his own ammo and one of the 4 with changeable weapons. Also he is the only one who requires only a two digit upkeep which means if you train him up he can shoot plasmaguns without additional cost who normally requires 100$ per shot. The other merc with a such a good cost efficient contract is Mr.Doyle as he just want some additional money for retirement.
Also when you fight enemies try to get the last hit one of the enemies with a cane because that has a nearly guarenteed chance for enslaving the enemy and as you can always enslave one enemy from each gender every fight that will give you at minimum additional 500$ per fight as each untrained slave is worth 500-1500$.