Great! Someone with the same fetish I have for the auction block. I envision a weeb-site where the girls are lined up and you can fondle each one and then choose to do the nasty with whichever combination you like. Keep up the great collection!
No I'm not sure you'd keep them pregnant, for a number of very good reasons, it's a bad aspect. Anything such as a sports academy for this is just wrong, you'd really want to buy from and sell to the market and look after your investment and add to the skills so you main gain profit to cover running costs, just like any company or sports team without an academy.
I like the way you think. Your "fresh meat for the auctions" gallery is right up my alley -- I love the kind of pics where she's struggling hopelessly, knowing that she's about to be carried out of her home / office / hotel room and into a life of sexual slavery.