I think Radnor is in Oak Hill. We used to live in walking distance to Radnor and our house was in Oak Hill. It is a beautiful area, we had deer in our yard all the time. But I can't think of any apartments in the area. Crieve Hall is right across Franklin Road, you might be able to find a duplex to rent there. It is on the bus line.I love Franklin, but it wouldn't be my first choice for public transportation to Nashville. I would also think it would be more expensive than Bellevue.One of my friends rented an apartment here:
http://www.woodmontterrace.com/index.htmIt's in Green Hills, right on Woodmont. They are older, but very charming. Limited amenties, but that didn't sound like an issue for you. I would consider this area based on your critera.