I have been playing with the concept of using a bicycle for my once-a-week trip to visit my in-laws, about 25 miles away. The problem however is that I live in a rather hilly area (Appalachian area of VA), and am not sure if the idea is feasibly practical. Assuming it could be somewhat realistically done however, what sort of bike would you recommend for the journey? My thinking on the subject is that a lightweight road bike would be less to heft up the hills, a mountain bike would be cheaper and lower geared but slower, and an old touring bike would be a compromise but harder to find. As far as additional information goes, the roads are not very busy and aren't too horribly rife with potholes and my budget is perhaps $250 (eliminating the possibility of any "new" bike). Thanks for any advice you can give!