I've looked at these before, really cool idea. I think one issue is the amount of waste needed. How does the author get 2kg a day? I reckon my house (of 4 people) chuck about 4kg a week into the compost.
A good way to supplement it would be with yer chook droppings, but still not enough to cook for a household.
I've had my aeropress for around 5 years, and i reckon i'm about half way through the pack of paper filters that came with it. I use them until they get a hole in them (or hopefully just before), which is maybe 5-8 times.
Somebody told me once that bicycles are the most efficient transfers of energy possible, from the calorific content (of food) to work done (km travelled). I'd like to see a similar style of energy analysis
A potential solution could be having a larger central community plant taking the scraps from several households. But again it won't be enough to provide cooking power for all, maybe it could give back some other type of community benefit.
Spitballing here but that slurry could go to community gardens.