I have been adjusted my entire life, as have my kids. I have worked in chiropractic offices for 14 years. I would never quit going as long as I have a spine! It has helped me with my worst pain (low back and headaches), helped my daughters with birth trauma, ear infections, colic, and falls. Also fixed my chronic pain after a mistreated ankle fracture. Plus it does help the immune system, we get sick less often than anyone else I know, and get better faster when we do.
It is common after a diagnosis of scoliosis, plus many years of non-treatment, which may have included car accidents sports injuries, falls, and childbirth to have to come in often at first. It takes time to undo all that has been done and learned. And once things are back where they need to be, you need to keep them there.
My favorite thing about the doctor I currently work for is that he doesn't pressure you to come in. He lets you know of course how much you should, but he understands not everyone can do that with their schedule, insurance, or financial limitations. Like someone else said, let the doctor know what you can do. Most chiropractors are more interested in treating and healing someone than they are in collecting a bunch of money at each visit. We do monthly plans once someone's insurance has run out, and have many patients who come in once a month for maintenance after a corrective schedule has done its work.
That said, I work for a great doctor who went to Western States Chiropractic College. All the schools are accredited and great, I wouldn't go to one solely because of the school they attended. Palmer is a great school, but I also know a doctor who went there that I would never go to for care. Find someone you like who understands your goals and limits. Ask your friends who they've gone to. It will help you, I speak from experience! Also try massage in conjunction with it, that's what's been most effective for me. PT prolonged my pain, and shouldn't be performed on a spine that's out of alignment, then you are just strengthening the surrounding muscles, keeping the misalignment in the improper position for longer!