You could go once every 5 days roughly twice a week with rat pinkies/fuzzies. I fed pretty often when my SD was a hatchling.Tho she is still far from adult,now she is pushing 4 1/2ft on small rats.
Any hatchlings I get I want them to have food in their bellies as often as possible (without overfeeding of course). When babies get hungry is usually when they start getting snappywhich is what I don't want.