Can Urban Rooftop Microfarms be profitable?

This question has been answered (on paper) by the
Southside Chamber of Commerce in the city of Brisbane,
in sub-tropical Australia. The chamber calculated that
with a little more than A $200,000, a “rooftop microfarm”
based on waste management could yield around 20%
return on invested capital, and employ three to four
people. The Southside Chamber of Commerce Urban
Agriculture Group is now considering how to fund a pilot
project in Mt Gravatt Central in Brisbane, in the state of
Queensland to prove the feasibility study findings.