Thanks for all the replies here.
737Pilotguy what was the cost of legalleon? Others seem to be in the realm of $10k USD
What people need is an example Petition Letter, this seems to be what your case lives or dies by. The rest is pretty straight forward in terms of the petition itself if you're going to compile it on your own.
One way to look at the cost of a lawyer is as an investement, but its also an investment in something which is still fairly new.
I spoke with a law firm yesterday. 485 applications submitted for EB2NIW, 80 returned and 50 or so approved first time up. That's enticing and with the building backlog it could be easiest to just jump in an invest the money rather than self petitioning.