I've beaten up many, many men in my time most of the time groups as well, try to touch me, you'll be one more.
If you ask why I simply reply, make a man a fool, he tries to reclaim his false pride, just to be snatched again :3
But I'd likely be one of the owners of the bigger establishments for both male and female trades (Don't be an idiot, its the 21st century, if one person is going to be slaved the rest are too).
So this slave trade would be instantly opposed against by nearly everyone so just getting any woman off the street your begging to piss off the wrong person, for example, if someone got me somehow, I know my Father would hunt them down like the dog they are and kill them or at least make them suffer :3
So going for random woman is a no go like Handofdoz says, criminals (Not all criminals, if someone has a sentence of 2 years, to get picked for a life time of slavery is too much, for Lifetime offenders its dependant on the representative sent to collect...Worthy subjects but all criminals can volunteer) or volunteers (HAVE to be over the age of 21 or no, you can imagine every 13 year old applying just for the sex the family of the said subject will get 10% of anything that the volunteer earns 88% will go to us the company and 2% will go to the volunteer)
Of coursed you'd get the training centre with varying degrees of intensity, such as 100% Sex Slave would be lifetime criminals only or full volunteers who give themselves completely for life these slaves have no rights once chosen or once decided and would mostly be rent based due to lack of stock but purchasable for a very high price.
Then Basic Training where the slave learns the most basic of skills such as cleaning, respect, manners and most of all obedience whether mind breaking/washing or simply teaching through conventional means.
Then Specialised Training where the slave has either picked their primary skill or had it picked for them. Even if the skill is not sex related, here they will learn at least some sexual training, such as normal, same sex, double penetration (For the woman), quick second and third use (For the man).
Then Advanced Training which is for selected slaves only, in this they will learn a lot more about their skill and because of their advanced use, also receiving more intensive sexual courses (And any sexual specialisation will be worked on triple, any Model specialisation will also have tripled sex courses due to their skill)
Unique training:This would mainly be either fighting, sexual or other high skill trades for slaves that have shown the highest aptitude of their skill and so become extremely high class slaves that have been able to earn freedom (They will not leave their vows and job because of loyalty and pay)
Punishment training:Disobedience needs to be stamped out as soon as it arrives, so if any slave is disobedient to the point of it being a problem, they are sent to be punished, many forms of punishment exist, light torture, constant work, a service of a cheap fucking with client after client with very few breaks in between or brainwashing. If a slave is too disobedient they remain a cheap fuck slave or if they are good lucking, 100% sex slave.
You'd need a few show rooms for shows, auctions, demonstrations, parties etc. And a main showroom for the cream of the crop, the highest class or most favourable skill.
Sign up centres where you go and sell yourself, request to join the trade as an employee or even report someone to be worth taking with a good reason for them to be taken.