I've read about YIMBY groups before, particularly the one called BARF (if I remember correctly). This is a great start to the type of work that needs to be done.

However, I have to ask: What is your group's funding situation? Who is bankrolling the effort? Is it grassroots funded, or are there wealthy benefactors who agree with the objectives (or, from a more cynical perspective, might be using your group for something)?

For the record, I believe both approaches can work. We have obviously seen the wealthy fund politics in favor of their interests and successfully get their way, but there have been grassroots successes as well. In particular, I am thinking of the National Rifle Association (NRA). Regardless of whether you agree or disagree with its cause, the NRA has 5+ million dues-paying members and it has been extremely successful at deploying those funds to achieve its very specific political objectives.

On a more abstract note: the founders of America may have originally envisioned a system where various interest groups debate the issues and arrive at a governing consensus, but the system has [d]evolved into one where those groups compete to raise funds that can channeled to lawmakers to encourage them to implement preferred policies. Some groups recognized this long ago.