My three neighbors have a shared well and pump. The loser is the person with the well on their property.

They all purchased their homes with the arrangement already in place from the previous owners and the original builder.

The arrangement was especially problematic and expensive for the person with the well on their property. They got stuck with all the expenses and then had to collect from everyone else when repairs had to be made. One neighbor refused to pay for their share of major repairs that benefitted them. Attorneys are involved. It is still a mess.

Whoever has the well on their property will also be using more electricity to move the water to your neighbors house. There needs to be some kind of an agreement in place to cover these incremental costs, which will add up over time.

The person with the well on their property also gets the call from their neighbor at 2AM when the water stops flowing.

I would not recommend this type of an arrangement.

Best of luck

Gary