you can certainly try, but as others have mentioned, you'll more than likely be stepping on someone's toes.
Example: my home town in WI is around 65K, not counting surrounding towns...there are 2 path groups in town, 1 private practice (about 5 strong), which contracts with 1 of the 2 main health systems in town, and NUMEROUS smaller hospitals in the surrounding region.
the other group, also 5 or 6 strong, is affiliated with Mayo, so they're hospital employees, so they cover the other 'large' health system in town and whatever contracts Mayo has worked out.
you may think 12 pathologists is too many for a town of 65k, but keep in mind the surronding area is peppered with towns of several thousand, and the nearest large regional med center is...well...3 hrs away in Madison.
and a town of 30k isn't necessarily going to be "nothing" specimens....it may be in a "BFN" location, but have a large volume (eg. Marshfield Clinic in Marshfield, WI).
Who wants to live in Marshfield, WI, pop ~30k? Hardly anyone...but the volume is considerable, and more than appy's and colon polyps.