Wow, people are really getting on their high horses and jumping to conclusions in this thread. Though I agree one should never go into the business for the money, the OP never said that was the only reason he was in the business.

Also, a lot of people waste a lot of money on expenses that are not always required. $4 and $6 dollars for rats are ridiculous, and your own choice. You can easily order frozen from an online company in bulk for much less pricing than that.