40 acres on a 63 acre lot... wow!

Would you consider breaking this up into smaller more manageable sizes? 40 acres will be next to impossible to manage, feed, and if the worst comes to pass, to eliminate undesirable fish from. Many folks here would much prefer multiple ponds over one large one to allow different species mixes and some experimentation. Personally I think it would be a lot more fun as you would have a lot more shoreline to fish from, and not be forced to use a boat to hit much of the water.

To keep a 40 acre lake topped off with a well will require a LOT of water and a LOT of energy.

A bunch of smaller ponds may be more manageable with limited runoff.