Hmmm - I like these quests, because essentially they tell me there *is* a fortress, and then stick it on the map. And then I can go and sightsee, shoot the locals, whatever.
I gotta say that cash doesn't seem that useful so far. I tried out a good char, rather than my usual thief type, and with a high repair skill mostly I just fix stuff up and sell at a margin (even without of course just putting junk together to make stuff to sell...)
The other great thing about not stealing stuff is... it saves so much time! In oblivion I'd obsessively loot everything and, realistically, you're just loading down your char with stuff you'll never need/spend/whatever. Not to mention the time spent turning everything over.
Being good is liberating. Fallout taught me that.