I too have been secretly toying with this idea. Though my approach is more of a tank. With 20" tracks on each side. Though I’ve had trouble figuring out where the motors to control any needed lateral motion would mount and drive the tracks. Then I saw the Goliath. Which I think will suffer slightly from the wheels going over cuts. Though their lateral movement design tackles that issue very well. The early bird price on the Goliath is $1,490. So expect a retail of 2k to 2.5k. Cheaper to build a flatbed imho.
The way I was kicking it around it would be solar/ grid chargeable and battery powered (help make it heavy) and the tracks would have a 1.5" - 2" lift/drop ability. So stock could just about be plopped on a levelish/ flat area of the yard and cut.
Had a string of thefts over the last month ( suspect Mooses swamp rats. They must have gotten bored while he was traveling) so my confidence in leaving the Maslow outside has been shook and stalled my plans. I know the sled is removable, but since all my wires have gone missing twice along with other small things, I’m not sure leaving the mega and motors would be safe. Anyway I digress. I figured a CNC tank would be much easier to bring in the house than a full Maslow.