Gas Stihl. I think the battery saws from Stihl are good and would serve well but are costly. Stihl has an economical homeowner line gas saw that is perfect for this. The bottom end battery saw is $299.00 The MS170 gas saw $179.00. A quart of the Stihl pre mix and motor oil for the bar. Just run it a couple times a year and it will last forever. The key to keeping it running is to not run ethonol fuel. Run recreational fuel or the Stihl premix which has the best shelf life.