Unless you have a full frame dslr, it's really tricky to do good landscape pics because of the 1.6x multiplier effect.
I'd have to disagree (sort of), whilst 14mm is wide, it's not that wide, I've got a 10.5mm rectangular fish eye (16mm on FX) which I use for panorama's / landscape, you can get a 10mm-24mm for less than £600 (branded and less for sigma / tamron) weight isn't really and issue as a landscape photographer with be carrying a tripod anyway so will make little difference. then you've got the option for stitching shots to get a wider view.
It's not tricky, it's just expensive lol