I completely understand that finances are tight, and this is the worst possible time to have this happen. That being said, there are just some instances that at home care is not sufficient. Suggesting you take Loki to the vet does in no way mean that I think you lack common sense and it does not indicate that I think you are a bad pet owner that does not love your kitty. I am bound to give you as much information as I can, and to provide you with sound advice to make sure your kitty gets the attention he needs. Being told by someone on the phone that he does not need to be seen is very similar to receiving advice from this site. Neither party has the benefit of having your pet in front of us, neither party has the benefit of vital statistics and lab tests. And, keep in mind that the people answering the phone at emergency clinics is usually not a vet, and not even a technician, but a receptionist who may or may not know what they are talking about. I hear your disappointment and frustration, and believe me, I share in the frustration part.
Because I have seen many cases of antifreeze toxicity and because I am so familiar with how sick these cats can get, I provided you with several websites to support the information I have given you. In my ER, we would NEVER tell an owner with a kitty that ingested antifreeze not to worry about coming in, or that it sounded like "he probably vomited most of it up". In my opinion, this is bad advice and is borderline malpractice. Unfortunately for you, the kidney failure that this toxin causes needs to be addressed ASAP, not two or three days from now. If money is tight now, you are really going to be in a bind if he does have symptoms of kidney failure, which requires hospitalization, fluids, and iv medications. Part of the reason I urge you to seek medical attention now, tonight is so that he can be examined, and you can be prescribed some anti-nausea medicines, take home fluids to give him under the skin and take some activated charcoal home too, which prevents further absorption of the antifreeze.
As far as any other ideas for at home care, nothing comes to mind that will support his system and flush his kidneys, prevent and treat nausea and absorb residual toxin. What can you do at home? Make sure he has plenty of water, switch to canned food if he is not already on it, because it is mostly water and that can help keep him hydrated. Please be aware that the kind of flushing his kidneys require cannot be achieved orally, but these are the steps you can take at home.
I am so sorry that this has happened, and I do understand that money is tied up in other places. I just feel that the vet you called has done you a disservice, and I hope your kitty doesn't suffer for it. I feel frustrated that you were advised, by a vet, over the phone, that has not seen your kitty, that he doesn't need to come in. I hope he does not have any issues. Please understand my frustration is not with you, I am just worried about your kitty. Please let me know if you have any other questions.