TL;DR
A center-pivot system on a Utah quarter-section runs $80,000 to $150,000 installed, saves 20-35% on water versus flood, and typically pays back in 5 to 8 years on alfalfa or grain ground when paired with a properly-sized irrigation well.
Summary
What it really costs to put in a center-pivot system on a Utah quarter-section, what the water and energy savings look like, and how long until it pays back.