Build Estimate?

Here is the deal... I have all my parts ready to go on the 99 GT, Pace setter longtubes, stage 2 comp cams, and lowering springs. People that gave me estimate will not do my exhaust work including my o/r x pipe. At 50 dollars and hour the estimate was 1,080. They also said the cams would take 11 hours!? The comp cam stage 2's dropped in I was told and from what I've heard can be done in a home driveway 4-6 hours. This place is not tuning it either so it's not tuning hours at all. Anyone in Michigan near Grand Rapids that could help me do this job??? Willing to pay but not over a grand. I feel that's a little steep for this job for just labor. What should be the top amount I pay!? Thanks in advance everyone!