Creating Caresheets is a great idea..the tough part is making sure your "staff" follow it. And the other side of the coin, how far is your petstore prepared to go to deal with illness and housing issues. Everything they do will affect the "bottomline". That is just business..
Best of luck with your setups though, and check with your local authorities to find out what you can and can not carry. Myself, I would love to see a spot with nothing but Kings, but then again, I am a little partial to them..