Z rich is a very sophisticated city with excellent shopping, nearby scenic sights and the center of Swiss rail transport. Airfares are relatively cheap in our view compared to ground costs, though that's a minority opinion and may reflect the way we spend money on the ground. Avoid spending your visit in a car or on trains. If you think it's once now and never again, you can certainly get a good flavor of the best of Switzerland in a week or less. But again, going for whatever length is better than not going.
City hotels are as expensive as any in Europe, though there are a few bargains.
The official languages are German, French, Italian and Romantsch. All are spoken in varying degrees in a dialect, though German speakers, for example, speak 'Hochdeutsch' as well as they speak dialect. The good news is that Swiss school children study two of the Swiss languages plus several years of English. If you're visiting Ticino Canton, Italian is useful. Well, like anything else, more money can help you enjoy yourself more, but doesn't guarantee satisfaction.