I learned early on ALL yard work has to be supervised by owner. No exceptions. Some yards may need a little bit less supervision than others but in the end if you are not "eyes on the job" you're going to be screwed.
Manson Ray Anchor 50Kg $250
This is a 50Kg (110 Lbs) Galvanized Ray Anchor made by Manson of New Zealand.
Lloyd's Register certified high-holding power anchor. This anchor has received tons of accolades from Practical Sailor magazine. Will deliver anywhere from Bellingham to Portland. PNW