HI,
I think that your intentions are well. I see that, you have to charge a fee (tell me if i am wrong or not) for traveling expenses (gas has gotten expensive), handling fees, and taking time (just like normal job you get paid for the time you put in) to look up reputable breeders, to travel to the location. And, if this ends up being your only job (even if you love it so much) you still need something thats going to support your family & yourself! I say if your being responsible about it then why not!
GOOD LUCK!