I can't speak for the entire question there because I did not use a lawyer. But based on what I've read some people saying here, they will pay no more than $1000 for a lawyers service. So I suppose your price isn't that bad. Now hopefully someone else can tell you what their lawyers are doing :P. Since I did it all by myself, I gathered as much evidence as I could and opted for more rather than less but I suppose three pieces of evidence for each year should be okay? perhaps beginning middle and end of each year, sounds alright. ;O
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Application Status: Self-filed on 8/18/12 to Chicago w/ Priority Mail and Delivered on 8/20/12 @ 2:47pm
Date of G-1145 Notification Received (email & text): 08/27/12 @ 3:48pm Routed to Vermont
Date of I-797C Notice of Action Letter Received: 08/31/12
Date of Biometrics: Received 08/31/12 and Scheduled for 09/17/12 in Cranston, RI.
Date of Approval: 10/23/12