He doesn't talk about who is going to pay for everything. In a road with lots of private ownership, one person can improve their property but they can't force t

He doesn't talk about who is going to pay for everything. In a road with lots of private ownership, one person can improve their property but they can't force their neighbours to do it as well. The only likely method is the deep pockets of the developer but why would they do this to only sell the properties to low-income families, which might be zero ROI when they might as well do the same in an up-and-coming city and sell for muchos dollars to the rich? I love the idea but the main reason why most good ideas are not implemented is that they are much more difficult than it sounds, often for many reasons, not one.