That is a wonderful idea that you have, it sounds like it will be alot of fun too!
The only other thing I could think of to add would be to make sure your dogs & cats are spayed or neutured, otherwise I think most of the others have the bases covered.
I hope all the animals are good for you. I did a speech when I was in 7th grade about grooming & had our poodle there, poor thing got so scared, she pooped right in front of the whole class Needless to say, I was really embarrased, I hope things go better for you than they did for me