This whole situation makes me sick
You are NOT rescuing this puppy from a bad situation, you are supporting an unscrupulous breeder!
My furbabies had troubles with the 1 hour drive to their new home, and that's with being held and cuddled the whole way. It is CRUEL to put a 6 week old puppy on an airplane. That is why it's ILLEGAL.
The OP gets zero support from me. Buying the puppy nice things and living your fantasy of having a perfect, little, purse pup is not being a good pet owner. The puppy's health should be your #1 concern.