No you should bring him to the vet- buying a pet is also taking the responsibilities of its cost onto yourself
Though I am sure more than most of the time people take that into consideration, things do happen. Not being able to afford a Vet visit does not make a person irresponsible. You should be more careful with that word.

With this economy, we should be banding together in a mutual uderstanding of the hardships we are forced to go through, not flogging someone who is in those said hardships.

To the OP: I am not suggesting AGAINST a vet visit. Your snake should be brought to a vet asap, though if you are not able to afford a visit, then there is not much else you can do. People who are in that type of situation and cannot pay for a vet visit, should be extra careful with their snakes. I mean, strictly serious. Don't play around with your snakes life.