I don't have much experience or knowledge of how stem cells is being used today. I know that in the past it was very iffy, expensive and most were disappointed. I know of a kid that was suffering from hearing loss due to premature thinning of the stereocilia in the ear. (the hair that picks up vibrations and converts to sound). He parents were paid over $40K out of their own pocket (insurance would not cover it) in 10 months to regrow the hair. There was about a 20% increase the first 4 months and then nothing. Once they stopped treatment, it all died within 8 weeks.
If you are considering going that route, I would spend hours online reading every review of the process and treatment that is available.
When my first child was born we were bombarded with sales pitches and contracts for her stem cells and the cost of keeping them, storage, maintenance. It was all over the news and the topic of many conversations. Eventually we went with a bank and they collected her stem cells.
I can't remember what the monthly cost was but after a few years the conversations around stem cells died down. All the medical miracles that were promised -one was a potential cure for paralysis- never came to fruition. I eventually stopped paying the service.
By the time my second child was born I couldn't even find information on half of the companies that initially approached us.
I have no idea what happened to them all. One of the main selling points was in order for stem therapy to work they had to be the stem cells OF THE PERSON receiving the treatment.
IIRC, at the time there was a 'moral' debate around the ethics of stem cell therapy and the president at the time, George Dubya Bush, opposed stem cell research.