I'm an oakland county guy. I would strongly recomend against buying a walmart bike, and instead suggest buying a used road bike. Something used from a quality maker like Trek or pre 2000 Schwinns. You can pick older bikes up from ebay or craigslist real cheap. You can wrench on them yourself, and if you don't like it, a used good bike will hold its value and be quite sellable.
If you ever get real into road biking, I would suggest Wolverine Club rides. I do them frequently with several other BFrs.
www.lmb.org/wsc