Routine services such as vaccinations, microchips and spay and neuter services can often be obtained low cost from humane societies and SPCAs. However, they typically don't provide treatment or physical exams because thet competes with local vets - something that they do not want to do. These clinics are subsidized by private donors, so the cost of care can be quite inexpensive for the limited services they provide.
Running a vet hospital, especially in a high cost area like LA, is very expensive. Vets go through 8 years of college training, need to pay for a building, a staff, expensive equipment, and one other very expensive thing - insurance. Medications are also quite expensive. So quality vet care can be expensive. So don't assume you're being overcharged.
Call around and ask what vets charge for basic services. Also some vets offer reduced-cost vaccination clinics on certain days to reduce this particular cost to their clients.
nothing you can do at home. It needs a vet. Sounds like a broken jaw and that means the cat needs a vet or it will DIE. Since you can't afford it like you claim then you need to surrender them all to a rescue.
Its very cruel of you to make the cat suffer out of selfishness. You KNOW the cat's jaw is broken and you refuse to have it treated. If its 'too expensive' to treat a suffering cat's broken jaw then you can't afford to vaccinate or care for the kittens.
Its sick to see you don't care if the mother starves to death becosue you refuse to surrender them to a rescue to be taken care of or becouse you refuse to pay the vet to fix the broken jaw