Richard, I don't know how things are elsewhere, but some time ago I checked into the possibility of donating my body when I die and did not like what I learned. At that time, everything I found indicated that the school or research facility had to be notified within so many hours of the death, they might or might not then take the body. Things that would cause them to decline was a body that was over weight OR under weight by too much, death was from certain contagious diseases, etc. etc. So I figured if I signed up to donate my body, then they declined to take it, my heirs would be unexpectedly stuck with having to make rapid decisions, have unexpected expenses, etc.
So . . . , having a son-in-law who is a mortician, funeral director, funeral home manager, my wife and I both have prepaid for our cremation, urns we selected, a niche in a columbarium, etc. AND I have indicated via the Texas Department of Public Safety, Drivers License division, that if any usable parts are needed, or can be used, from my carcass they can certainly be taken and used.
Incidentally, I know nothing about other funeral homes, but our son-in-law has most of their prices posted on their website. Naturally, prices for things such as caskets can vary depending on the particular one chosen, transportation charges can vary depending on distance, flowers can vary depending on what is chosen, etc. etc.
So if you think funerals are expensive, I agree. Isn't nearly everything expensive now-a-days? But do you think you could provide such a service, vehicles, employees, facilities, etc. for less?