Keeping advanced level fish is really not that complicated or difficult. Discus and (in my case) altum angels simply require frequent water changes. This is the primary difference between advanced fishkeeping (should be called "waterkeeping") and easier species. It requires an attitude adjustment, the idea that you are willing to do what is necessary to keep this species in health. I drive to my office twice a week to change 50 gallons and I do it with pride because I enjoy those fish that much. There is plenty of other tank maintenance you can do while the water goes out and in, so it is not like you are watching paint dry. The real problem is vacations.
You either embrace what is required or go with another species.