Well, you can maintain a tank with ich without irraticating the problem. There are many problems that come with that though. Introductions of new fish are 50/50, meaning that most new introductions will get ich and set off another epidemic. Each epidemic has a chance of getting worse. And, there is always the risk of secondary infections that come with it. But, keeping your fish population to a bare minimum, great water quality, compatible tank mates and most importantly VERY good diet. You should see it come and go. Fair warning, they can and most of the time do regenerate rapidly, and even healthy fish can be taken over no matter the circumstances. Parasites in an aquarium environment is a cancer. Some live with it, and it can go into remission only to pop up again anytime. It's a gamble, that most people play, but everyone at one point or another will lose. The house always wins.
What concerns me is that it's not that you don't have the means to solve this problem. Is that you don't want to be hassled by it. It's your tank, do what you feel comfortable doing, and want to do. But solving a very inexpensive easy problem just because you don't want to be bothered with it will bite you in the end. No offence, no one WANTS to be hassled with a QT or pulling your fish out for months. But if you want a healthy system, it's a necessary evil.