First buy the pets and breed them yourselves first. Get the hang of it and then start selling. Know your risk and calculate the amount needed for all the expenses(You dont want to miscalculate and let your animal risk dying from hunger =.='')

Anyway, it's quite a lucrative market if you can market it well and let people know about this. Previously i did breed hedgehog but quit already now cause my housemate dont like me keeping those pets.

Anyway, good luck to your journey