With the Creation Kit coming out very soon, here's an idea for any modders.

I wish you could restore Helgen. It could be a nice little questline. Clear the bandits, gather the scattered survivors, bring different kinds of ore, ingots, and firewood, donate money to the restoration effort...

You could even use your connections to get business. The Arch Mage could use his connections at the college to get an alchemist shop in town, the leader of the Thieves Guild could get a fence and even some legit trade, you could get the Companions to provide muscle, either the Imperials or Stormcloaks to send guards, the Bards College could send word to all the bards in all the inns that an innkeeper is needed... the possibilities are endless!

And then, of course you're going to want to live there after spending so much time there. You could then pay to build yourself a badass house. Build it up on a hill overlooking your work.

Then, as your town grows, you petition the Jarl of the hold to allow Helgen to become a hold in its own right, and you, the savior of Helgen, should rightfully be its Jarl. Construction walls in the area around that badass house and expands it, making it a modest castle-- bigger than a Longhouse but smaller than Dragonsreach, for example.

And there would be a library. None of this 3 bookshelves per house crap. Every book in the game could be on display. 5 or 7 mannequins. A forge in the basement.

This sounds more like a Fable style quest than Elder Scrolls, but I think this would be fantastic!