But your idea is good, and the investment is not real. You can invest in some joint-stock cemeteries, but there are many rich people these days, and people who can open cemeteries generally don't lack the little money you invested, so it's hard to say!
If you are really rich, I personally suggest that you cooperate with the Civil Affairs Bureau or bid for the cemetery yourself. The procedures are very complicated, mainly because the procedures for land use are not easy to approve. If you have connections and can get the land, everything will be easy. As for management, you can ask me to help you manage it. I have the strength in this field. This number is not used by one person, but by a professional funeral team.
Supplementary answer: If you have enough funds, you can apply for the development of the cemetery yourself, which is the same as real estate development. Now many real estate development companies are transforming into cemeteries, such as Sanhe Guangyu in Wuhan and Hua Ting Investment in Chengdu. You can learn more about it. Whether you can do it or not depends mainly on your strength and financial resources!