In general Norwegian prices are awful and make many an "expensive" destination look a cheap bargain in comparison. But then there are those unusual pricing arrangements that foster a market in smuggling diapers out of Norway and into some of the poorest parts of Eastern Europe.

I am just glad that most of my Norwegian stays are with relatives or at hotels where I have landed a bargain using points or special codes and that breakfast and even some evening meals may be included in the hotel rates. The most ridiculously overpriced pizza I have ever had has been at a Norwegian airport -- I don't even want to go back to recall the exact amount I wasted on that.

Hurtigruten has some last minute relatively short trips that are reasonably priced in comparison to what you noted above, but this isn't the kind of trip on which an infrequent visitor to the area wants to gamble with last minute deals that may or may not come available and doesn't sound like it would necessarily be meeting your interests in just the Tromso area.