As you are probably aware I'm frantically trying to keep up with everything on several other platforms so my presence here on SSC has been limited lately so I apologise for not responding to your introduction sooner!
I think there are great challenges and lots of fun to be had to try to live more sustainably and self-sufficiently in built-up areas. Small spaces can become flourishing food crops - all that's needed is a good bit of sun, inventiveness, and the will to succeed.