Norway is incredibly expensive, particularly for alcohol, so my advice would be to give up drinking while you're there. That said, because the kroner is effectively a petro-currency, now is quite a good time to visit.
The Hurtigruten is a great way to see the fjords, but there is quite a lot worth seeing away from the coast. You could perhaps take one of the way "Norway in a nutshell" type tours that takes in Bergen, Flam, Voss etc. as an alternative to hiring a car?