Hmmm, It is an interesting concept. But 'funding' the game, and providing art works of 'realistic ammo and hundreds of zombies on-screen' drawn by someone off VGchartz for $20 each, whilst not mutually exclusive, are definitely an odd combination.
A game being in 'pre-alpha' makes the assumption that you have usable builds of the game, and that the project is evolving and being tested after changes are made. I am glad for you if this is the case, and I am sure that your talented programming team has devised a working, yet buggy, MMO world, great physics and a brilliant interaction systems and are just waiting for some photo-shop pictures so they can keep going.
Good Luck!!!







