Looks like a pretty reasonable set-up to me. A few things to keep in mind though would include; do you have a cased well, how deep is your static water level, and will you have a problem using a pvc pump in the dead of winter (pvc can get pretty brittle in cold weather).
"Hold on, my friends, to the Constitution and to the Republic for which it stands. Miracles do not cluster and what has happened once in 6,000 years, may not happen again. Hold on to the Constitution, for if the American Constitution should fail, there will be anarchy throughout the world."
- Daniel Webster
When I am afraid, I put my trust in you. In God, whose word I praise, in God I trust and am not afraid. What can mortal man do to me?
Everything that lives and moves will be food for you. Just as I gave you the green plants, I now give you everything.