Since your balls are babies.... do this. Go and get a $2 rubbermaid container and put one of them in that. Make sure it has a heat source, and you will be fine. Babies actually do better in one than a fish tank in my opinion. Come to think of it....so do adults.LOL
As far as going to Vet is concerned... I say this. Honestly most Vets don't have a clue about snakes. I'm amazed at what people tell me their Vet says. If you go to the Vet, make sure he/she is a herp Vet. A non herp Vet is going to find something wrong with your snake....It never fails.
If your animals are healthy and eat fine, then save your money for a cage. Even captive hatched babies usually do well without treatment.
Now people...I didn't say don't ever go to the Vet. I think sometimes it is overkill though. Most of the time I would much rather see people buy better caging and such for their animals with the money.