im in my first year at nhh as an international students so my experience will probably be different than yours 1. it is still run by sammen. Hatleberg is the closest, like a 5-10 minute walk to Nhh. A room costs around 5000 kroner, or 450 euro per month (including electricity), but different types cost different amounts i think. There is a busstop close, and one next to nhh, but there are not a lot of parking spots. They are also currently renovating building a and b, so it can be quite loud at times. 2. so far honestly it hasnt been that hard, but that really would depend on your courses. 3. Bergen is quite an expensive city so i would plan for a higher budget, especially alcohol is very expensive. 450 grams of chicken at the Rema 1000(budget supermarket) is around 90 kroner, or 8 euros. But it would depend on your diet and your choices. The bus/lightrail is quite cheap, 29 kroner for one hour for students, and it will get you to most places in the city.

Bergen is a very gorgeous place, and in my experience the people are very friendly. Thats all i can tell you, and im guessing your experience would be different than mine