Oh wow. I think this is worrisome on many counts.

He is 1) pushing 2) a non-standard, uncovered 3)experimental treatment on you that 4) stands to benefit him a lot financially 5) against your oft-stated wishes 6) and beyond your financial means and 7) trying to give you guilt about your non-interest and 8) trying to shame you into involving your family in paying for your treatment when you prefer not to.

Run, don't walk. That is not cool. And likely reportable.