What's the point of the modern western city? Industry is usually gone, there is no need for large concentration of work force. However, rural areas and towns are getting deserted. Big cities are disaster for everything/everybody involved and must be outlawed. A compact 30 thousand city ( with sidewalks and parks, gardens) should be more than enough to support administration, education, science, etc.
I agree with your ideals, but the thing that makes it not work is ...where do people work, and what do they do? 30,000 population wouldn't support any kind of ...employment, would it?
Baron Max