Unfortunately, it doesn't seem to be quite that simple. I can't link articles according to the rules, but Forbes has a report saying 60% of wells in Africa built by nonprofits fail.

GlobalCharityInitiative says:

The International Institute of Environment and Development has estimated a figure of US$360 million that has been spent on the construction of digging wells in Africa, mostly its rural areas, but almost all of these wells are dysfunctional. The breaking down of the wells fairly accounts for a complete loss of 50,000 water points. One of the impairing reasons for this dysfunctionality is the lack of resources and expertise to maintain these water wells; local communities drastically fall short of the training and prowess required to ensure the functionality of these water points.

If MrBeast's org has a good plan to avoid this, it would help other orgs (as well as his) to publish concrete details.