Hi. I had the same problem with regular dentists. I had to buy dental insurance so it would cover some of it anyway, and then I went to an Oral SURGEON, who looked at my xrays and agreed right then to pull them all. Most DENTISTS will not pull all your teeth as, (in my opinion) its true, they cannot make money off of you then. They would not do it for me either. The Oral Surgeon did though. I also recomend going to a facility that specializes in dentures, as they will do the extractions and the dentures too, in a PACKAGE deal.Make sure you check prices, and coverage beforehand though, so you will pretty much know where you will stand financially.
If you can get Dental Insurance to help offset some of the cost and find a participating oral surgeon, it would help. Investigate what is covered and what is not first though.