Indeed.
Nothing in the article suggests good or bad management.
I'd only be concerned that it's a rather small corner to live off, so if it's not hobbyism then ravenous overharvesting seems to be a necessity? It's about 350 x 1000 yards (280x1000 metres) --- more of a large garden than a forest. A good oak harvests about once per 150years, and needs at least say 5x5m for itself (initially less, but you thin out by harvesting over the years) --- this leaves about 150 trees per acre [conveniently =O] or 73 mature trees harvested per year at varying values, worth say £500 but costing a lot in transport, cutting down and processing [processing cost taken on by his own sawmill].
So you're looking at a £50k turnover (including the smaller trees), with a lot of costs (labour & insurance), or are my sums off?