My dad bought his first clone in 2004 and it has 1500 miles on it now. And those 1500 miles were hard miles, high revs, wheelies, donuts, wrecks, you name it has happened to that bike. But, it has withstand the punishment and held up very well. Nothing major has ever broke on that bike, and it is chinese...
If the motor was one of those ebay bombs it would have detonated long ago. There are varying quality levels with the PRC stuff, just like anything else. With so many different brand monikers on the market, it's difficult for most newbs to know what to expect with their machine. Your dad's usage averages-out to 300 miles per riding season, not exactly high mileage. Limited use will extend the number of years something lasts and if that's how much (and how) you ride, then perhaps you have your ideal setups. It does tend to give a different perspective than riding 2000-3000 miles annually. "Minor" becomes a relative term. A broken clutch cable is minor, unless you're 40 miles from home when it lets go. A swingarm pivot bolt is a small part that can have big consequences if it breaks at speed. A hub failure, well, that's just unacceptable now matter how you look at it. The best approach is pragmatic: identify the weak items ASAP and replace them. Once that's been done, you should have a mechanically stable machine.