RPG Single Player Project: The Fifth Element

I am developing a great frozen throne project, not a mod, not a multiplayer open rpg, but a SINGLE PLAYER GAME, with many maps linked and a great and inteligent story.
The matter is that I am working alone so far. I mean, I COULD do it alone, but it would take one year to complete.

The game will consist in three chapters (and 1 great cinematic at the beginning and at the end of each one) and one short final chapter, which I use to call "Final Showdown".

I have been written the story and done the terraining of the first maps of the chapter one and chapter two.
Here is the prologue of the story:

"Vangarst, the great king of Ganduin, suddenly died during the great supper of the Winter Celebration at the Royal Castle. Later, to the astonishing of everyone, it was found a powerful magic poison blent with the wine in his cup. That was the only way found by someone to kill a man that long ago had been blessed by the gods with the gift of immortality. People cried and grieved for the unbelievable death of their beloved leader while his honorable and devoted knights tried to find the murderer by all costs. Who would be? Who would dare to kill the most adored, loved, and powerful man of one of the most important and influent kingdoms of the known world?

Passed a couple of months without any valuable answer or clue. Ganduin is being governed by Vangarst's oldest son, Fanganis. But he doesn't have his father cunning and skill in managing such a great kingdom, and the death of the Mighty Vangarst encourages the foul enemies around the borders to come forward into Ganduin. Yokalahal, the Sage, used to say that Vangarst was one of the pillars that kept the equilibrium of the world of Men, for his might and influence was acknowledged in many lands and realms, and his enemies, above of fearing him, respected him. Now the equilibrium of the world has been affected. Most governments around Ganduin are falling under the pressure of the Horde that has raised more powerful than ever, now sure of its victory.

Quickly the Foul Army is overrunning the East Continent, and this time Ganduin, with a disbelieved people, cannot put an end to it. Few will be the days until the once powerful kingdom hold on no more against the continuous enemy assaults. So are the hopes in the hearts of the people in the East Continent.

Now Alarius, one of the bravest princes in the Ganduin Council and greatest Vangarst's friend, is the last attempt to save Ganduin. He and his faithful follower, Mothar the Rough, were sent together with an little army stealthy across the Sea to reach the far West Continent. There they would search after answers and try to get some help, if possible. But only Alarius and Mothar made it to the boats alive after facing many Horde's minions throughout the way. Just now, after leaving the Rocky Shore, both of them approaches the little town of Misgard..."

So, I'd like to see if there's anyone wanting to engage in my project. I am needing a skilled trigger man, a modeler maybe and voice actors eventually.