First I've been doing this solo for a while and have a pretty good handle on what I need and how to calculate overhead. I've been asked to bid a few commercial properties and having trouble with labor and equipment. With labor I am just figuring an hourly wage + 30% for payroll taxes and fees. Equipment is tough. I usually pay for my equipment in full. So should I just break the purchase price down into estimated number of years used? What about replacement cost for buying new equipment? Is that taken into account of just pulled out of profits?