I don't think there is any, after all as far as I can tell there isn't much to do. You buy slaves then train/breed them ... and that's all? Maybe do some quests for guild but just as I said it involves training slave they give you to meet some requirement.
Training itself is pretty easy, get slave mood to serene/ecstatic and horny then just spam lvl 3 option.
For making easy money early one just do hard quests for guild, preferably ones involving hypnosis as they are super easy, you can complrete it in day or two if you are not focusing on request.
As for breeding... I don't really understand it, looks pretty random for me. With hyper pregnancy and impregnanting intelligent beautiful looking slave while my slaver is stunningly good looking, gave me hideous and moronic offspring.
Plus you need to consider that not anyone can breed with everyone. Orcs/goblins/humans have most options available to them.
You can always set up brothel or ranch, but honestly I see no reason to do so. I am swimming in money from guild requests. So in my opinion only interesting thing to do would be setting up breeding grounds to try and get perfect slaves.
As the game is there is no real value in playing it unless you want to roleplay being slaver/breeder but even then there are better games out there for people interested in it. If you are interested in breeding then I would recommend slave matrix, if in being slaver then free cities are great.
