Well, there are normal maintenance issues to attend to, like tire inflation, chain lube, etc. but those aren't really repairs. Other than tire flats, the only actual repairs I've had to do is replace brake cables that snapped. This happens every 5,000 miles +, so it's not that frequent. The repair takes about 10 minutes so not a big deal. Not much to make it easier. Of course, one could argue that cables are a maintenance issue and that I should have replaced them before they broke.
Oh, another one: My saddle cover on my commuting bike started to crack and tear. To be expected after 5 years of daily use. I recovered it and all is good.
Others here have reported problems with spoke breaking.
Good luck on your project.