Member Rara Avis
Money is no object.
Two million bucks, Parker, and I'll write whatever software you need (I'm not cheap, but I can be had ).
Seriously, it sounds more like you need a database system than web authoring software. You might investigate Hyperseek, a very popular Directory (like Yahoo!) package. Not cheap, but good. The author, John Cokos, is an acquaintance.
Another friend of mine, Bob Massa, has put together a very extensive Portal system that uses Hyperseek and many other great tools. While a lot of the users are building vertical portals with the system, Bob's emphasis (and many of his articles) has always been on local portals. And that sounds like the direction you're heading. Check it out at http://www.searchkingportal4u.com/