Yes, it is considered breeding. You put a male and a female together with the intent for babies. Personally, I would separate them. You're not really in a financial position to care for these animals if something goes wrong. $300 is really a drop in the bucket for an exotics emergency vet. It would likely cover you walking in the door and having her euthanized, but not much else. A chin breeder on another community I'm on had to take her chin in for an emergency c-section and it cost her around $1500. And that wasn't including followup care with her regular vet.
If you're not financially in a position to take care of the medical needs of your current pets why would you want to breed more?
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry