Other things to consider....

Some 'codes' do not allow a 'dual source' or (for lack of a better term) output. For example septic.... if you go city sewer line, some places REQUIRE the septic tank to be crushed and rendered un-usable. Haven't had to deal with that personally.

Depending on the depth, you will reach different aquifers. I know of 'older' Florida homes and during a drought, the ENTIRE area 'ran dry'. All of the homes drew from the same aquifer and the water level got so low- none of the wells 'had water'. Massive number of wells 'dried up'. Some residents had deeper wells drilled to reach a deeper aquifer and ensure a better supply.