Hello all! Been lurking in the shadows for the last few months while devouring info from the vaults. Finally took the plunge and joined up today in order to ask some questions I've managed to compile while planning a solo lawn maintenance start-up. I'm currently working on fleshing out an initial equipment roster. In the course of so doing, I'm trying to get a feel for the average lifespan of gasoline-powered handheld equipment like string trimmers, stick edgers, backpack blowers, kombi-style power heads, and other equipment like hedge trimmers, pole pruners, chainsaws, etc. Nailing down expected lifespan will enable me to accurately calculate depreciation when comparing the true operational costs of different makes / models within a given category, plan and budget for replacement, and accurately set my labor rate for each tool. Understanding that those who track hourly use on handheld power equipment are probably few and far between, does anyone have a good feel for how many hours typical professional-grade string trimmers, stick edgers, and backpack blowers will last on average?