I completely understand the whole not being able to afford it right now. We have 4 chameleons and a puppy. We spent the money we had saved up for our puppy's final vet visit with his shots and then our one chameleon suddenly started acting sick. We couldn't afford to bring her in until we were able to get the money, almost 2 weeks (bi-weekly paychecks, woohoo!). Nothing is more irritating or annoying than people saying "too bad, you need to find a way to get your pet to the vet" so I completely understand where you are coming from. Some people just don't understand that every once in a while the money just isn't there. It's not that you can't normally afford to bring your pet, it's just that right now, the funds are not available. And if people say that has never happened to them, then they are truly blessed. With that being said, I know for a fact you are not alone on this matter and that many people, myself included, have panicked about a lack of funds and worry about how you're going to take care of your animal.
With that being said, I think it's great that you took the initiative and took matters into your own hands. What I would do is find ways to save up, maybe ask family if they need help around the house (I don't know how old/young you are, but either way I don't see why maybe a few helpful chores couldn't be done for family/friends). Maybe you can help clean a house or something and they can pay you. Until you can come up with the money, I would just keep an eye on it. Then I would do what another member said, maybe call up a vet in your area that is an exotic pet vet, mention the situation but also mention that you don't have the necessary funds right now and see if they are willing to set something up with you.
Do you know what happened to your cham that made him/her have puss on it's foot?