Congratulations Alexandria!
I don't mean to be rude Metro, but I have to question a ruling here:
No restrictions. You can create the max (6) if you wish along with your founder.
This was about creating pets in CAS along with a founder. I remember that Pets get extra money if you start with them. For instance, if you create Mr. Dynasty, he gets §16,500. However, if you create Mr. Dynasty's Horse, you'd get just over §15,000. I think (Note the THINK here) that Sims and Pets created together get more money, but I haven't loaded the game for a while so I cannot be 100% certain.
EDIT: Reading the guide, it's confirmed for horses. I'm about to read about Cats and Dogs.
EDIT 2: By the guide, it's only horses.
Also, can I use a Swap Shop sim as a founder? Can I download, say, Drey Kular, and use him? If nessecary, can I download him, put him in a save game, add him to the Sim Bin then select him to get rid of any inventory objects?