Fair enough, that does make sense and sound cheaper. I guess the only thing going it vs your evaluation above would be the environmental impact. You wouldn’t need to affect that barren field, you’d be using already compromised land. But yes, the support structure costs would be prohibitive and possibly have a higher environmental impact in production vs just razing and sunblocking an unused by humans field. Also there is the aesthetic side where many streets might be improved with shading, where not many fields are improved by appearance of arrays of solar panels.
Thinking about this more, and extending/tweaking the kernel of your original idea of solar close to consumption, and providing shading: an ideal place for solar is to use it as shading in car parks. Underutilized land, demand in the nearby businesses and to charge parked cars.
Not really my idea by the way - I have seen a number of such projects underway on the web, and in real life.
