USA local search engine

[localsearchengine]

Hello all.
I'm going to develop a kind of a search engine, oriented to products and services for local users. For a lot of reasons I would like to create subdomains for each state of USA. As my own site is still mostly in my mind, to get an idea of what I'm looking for -  you can look here Missouri by owner or here New Mexico fsbo houses (this is certanly not the best example of  webdesign and usability, BUT those guys made EXACTLY what I need from the point of view of subdomains).
So my question is the following: how is it better to configure DNS and web-server to make the same way (I will use linux hosting). Truly speaking I know how to make it working for 3-4 subdomains but if we make 50 different independent subdomains - the maintenance and support will by very difucult.
Thank you in advance.

[LoisWakeman]

Sounds to me you need to learn to walk (understand about the way to set up and run servers) before you run (develop a search engine and related sites).

I think there are forums better suited to such questions too. Google is your friend.