I know a case where a Poulan 4620 (46 cc, 20 inch bar) something-or-other, purchased reconditioned, was used for milling with a Granberg small-log mill attachment to mill the trunks of two red maples (Acer rubrum) that were about 20 inches in diameter and about 8 to 9 feet long. At maximum width, the bar length was exceeded. The saw did not burn up; it is still working. That was the start. Now use a Husqvarna 394XP. (94 cc, 42 inch bar) Purchase price on the Poulan was either $139 or$149, or maybe it was $129 plus tax. Small and cheap for a start, but it did not stay that way.