I've got four road bikes each of which see over 1000 miles per year. I've only run into two problems that I couldn't resolve and that required the help of the LBS. One good thing about having more than one road bike, if you're caring for them yourself, is you don't feel rushed to complete a repair so you can "ride tomorrow." I find that I can walk away from anything that frustrates me or for which I'm unsure of how to proceed. Then I take a day or two to figure it out, while riding one of the other bikes.