all together there were 10 or 11 people working on it. almost too many chefs in the kitchen after we got down 8" at the first tier. we also breaked a lot for instruction and theory, but it was done in 8-9 hours. Our instructor said it would be possible to do a similar pond in 8 hours with more plants with 4-5 guys.
I'm not sure, but i greatly suspect the HO gets the pond for just a hair over cost.
as for my first solo, just as soon as i can find someone who wants one in their yard.
Efficiency = Profit