Any chain saw that only costs $250 is at best a Harry-home-owner toy that will be junk after a little bit of use. A good commercial grade saw, Johnsered, Husqvarna or Stihl is a heirloom piece that, maintained properly, will last several decades.
And it is all about a sharp chain and proper chain tension....... all of it.
I put up 20+ cord a year........ and have Husqvarnas that are near 15 years old that I have worked like rented mules.