I just finished overseeing and facilitating the construction on this wall. Rhiwena and Tygel did the lions share of the physical work on this project.
We used a slightly different approach than in the past with bales on edge and stuck on rebar spikes concreted into the footer when it was being formed up.
This minimized materials needed and kept the hours down around 150-200 total. The project was completed in 3 weeks about 4 days a week for 5-6 hours for 2 people plus about 35-40 hours additional labor from a third person taking care of logistics and materials.