I'm having a built-in bookcase put into my living room. the total dimensions are 12' x 7' x 2'. I've already purchased 2 materials, 4 double door base cabinets and Cherry flooring that I want used to construct the bookcase. I know that plywood will need to be used as an underlayment for the floor boards to give the unit strength. I was quoted a labor time / rate of 5 days at $40.00 /hour for the carpenter and 3 days / $30/hour for the carpenter helper (who is also an experienced carpenter himself). The ballpark estimate for the whole job is $2500-$3000. I live in the PA area. Is this a good rate? The carpenter is supposed to be a friend down the street and he said he usually charges $50/hour but gave me a break. thanks!