I had a 180 foot deep well installed. I reworked large parts of my existing irrigation system to handle larger flows. The pipes keep getting laid into various corners of our 1.2 acres.
The local water company was sold and winds of rate increases loomed. I was already spending about $50/month throwing water. I wanted to throw more. The water is pretty darn pure from that deep and won't stain concrete like the more common shallow wells here in Florida. Now I can drain and fill the swimming pool without paying $100 for city water. The drilling was fun to watch but left quite a mess of slimy drilling fluid I had to shovel out.