This is how we get ourselves in trouble. there is NO F*ING WAY to even get close without seeing the job. When someone in here says "OH hell, it can be done in 40 man hours - no problem" someone else ends up not getting paid. When in fact the reality of the job is that it may take 100 man hours or more based on the building or customer's requirements. I've been hurt a few times with this. My advise to RTH, get a second or third estimate from QUALIFIED installers in your area. my 2c