Earlier quoted context omitted.
The cost varies by cut width (44" is quite a bit cheaper) but yeah, it's very commercial oriented. It's intended for people who need to mow difficult slopes day in and day out. I'm not aware of really anything capable intended for homeowners besides a good ol' push mower.
There are homeowner-class track mowers that are designed for steep slopes. Our property is pretty hilly so I keep telling myself that when my Husqvarna riding mower finally dies (it's only 16 years old) I'll buy an electric one. Unfortunately that Kawasaki motor just keeps on going and I keep repairing everything else.
Being tracked only really solves the traction part of the equation so they aren't necessarily any better at navigating slopes safely than a wheeled mower.