I've owned my current road bike for 2 years. My LBS 'tuned' it up for free last year. I have 4900 km on that bike. Same chain, same brake pads, same tires, same everything. I am planning to take it on for another check up in the next week or so and expect to get a free tune up and perhaps replace a couple things if they suggest it. And the LBS gives me 15% everything in the store.

PS I have patched and reused tubes many times. Some more than once (same tube, new cut). Haven't had any repair fail.