Thanks for doing all this, I think the next steps are exactly what you are doing. I'd be glad to help you do a count, we should try to figure out a way to do it in the most rigorous way possible. I think Ricky had mentioned at some point in the past that there are a couple of apps/tools that could help with that... I'm sure that other FoHPans would be glad to help as well.
I believe the city has at some point looked at this possibility, but the only way they'll look at it again is if we push for it. Maybe we should put in feelers with AURA as well? They might be interested in helping out on a project like this.