hello everyone, this is my 1st post. i'm just doing a small, one home per week business. in payson,az there's not much grass but lots of residential properties with native granite for their "yards". so i deal w/ lots of weed hoeing and leaf raking. i want a gas blower real bad. i just don't know what kind of CFM/MPH blowing power i need to handle leaves and small twigs, etc. about the only thing i do know, is to get a commercial quality unit. please advise, someone, please.