Ball pythons are not made to handle eating that much bone, nor would they ever do so in the wild. A live chick would be a better option than pieces of adult chicken, but frozen feeders are very readily available from many different sources online. If it truly is an availability issue, then there is no issue at all, just order online. If it is actually a cost issue and you can't afford to feed your snake, you might consider rehoming him to someone who can, for his long-term well-being.