Yes, I think there is more urban gardening than we think, as we see from the many posts on here and if you look around the net there are a lot of people planting a bit. I can't confess to be using my ground (a lot of yard) out here in the country either for the same reason many move to urban areas. I work away a lot in the summer and can only manage so much. A big move I have noticed is people planting veggies in with the flowers which is a great way some people get around HOA or planting things that look good with their other landscaping.
I'm assuming that the farmer's market is a more happening place in warmer weather when more is grown. I think it awesome that you participate in it. What all do you sell?
I too would love it if more incentives were given for solar power. One day, assuming I ever get to retire, I hope to live as much off the grid as possible. I wouldn't mind it now but I don't have the money.