Several opinions-collapsed arch, jaw, bite. Osteoporosis Implants

Multiple health issues but primary question now is regarding my mouth. I have Osteoporosis, RA, OA, severe scoliosis, severe arthritis throughout my spine, neuropathy, and other stuff. Two yrs ago, the orthopedic surgeon said I need a rod in my back & have three smashed discs. I have had scoliosis since I was ten but always thought it only involved two discs. He refused to fix any because two are inside the curve and the one outside will make my back collapse. Second opinion said, sure, he can fix the one outside the curve. Third opinion (to break the tie.) Of course, he said they are both right. I will probably need the "big operation" in the near future, but he can fix the one disc outside the curve. Had that done two years ago. I've had 12 or 13 surgeries in the past ten years (six shoulder, 4 or 5 foot from a failed bunionectomy that broke/dislocated six joints in my other toes, back, so now I have PTSD and panic when I go in for any procedure. Shocking but I also have depression and anxiety too.
Long story to set up my question:
I have lost a lot of bone in my mouth and my teeth are rapidly falling out in my upper arch. Depending on who I talk to, some say from Reclast, Osteoporosis, etc. My old primary dentist (40+ yrs) referred me to a Prosthodontist who tried to tell me I need this stock denture. Moved on. Second Prosthodontist said I must have a pallet if I get implant supported dentures. One of his surgeons said six implants to support denture. His other choice said NO implants because of the Reclast. My NEW primary/temporary? dentist said no implants- they won't work and right now dentures probably won't work either unless I use the goop to keep them in place. She put me in an Occlusal Guard to help move my jaw where it belongs.
Went to a another opinion since there doesn't seem to be a consensus w/anyone. My ex told me his dentist/pros. was good so, off I went: He said he doesn't feel comfortable because my mouth is a "unique situation." Sent me to a surgeon that said I can get "All on 4", same day, and then the Prosthodontist will care for me afterward until I get the permanent bridge (and he said I do have plenty of bone.) The Prosthodontist wants to go to my surgery to collaborate w/surgeon. This surgeon has a nifty brochure with a lot of info and appears to have many good reviews but I heard that can be manipulated. Who knows?
I stopped Reclast and my primary doc (love her) put me on Tymlos to build bone in my mouth because my upper teeth are rapidly falling out. My Rheumatologist (love her too) said if my teeth are falling out now, won't the implants fall out too? I take Oriencia infusions once/month which I would have to stop during this process.
I fit into so many of these groups, it's ridiculous and cannot find Osteoporosis as a choice. I am 64 yrs old. I'll just pick one and someone can tell me if I am in the wrong place. Somebody please tell me what to do.
Scared, overwhelmed, and don't know what to do. I am retired and lost quite a bit in the Stock Mkt. The bridge surgery will cost a minimum of $25,000.