I am busy and my time is worth a lot. That is why I do my own wrenching. I don't have time to waste waiting for a LBS to do maintenence and repairs.

This isn't rocket science. Bikes are pretty simple mechanical devices. With a few simple tools and the Park Tool tutorials, you can do 95% of the maintenence and repairs on a bike. You will save time and money. You will also in all liklihood have a better running bike because you will be more proactive.