Welcome mainewolfdog, go for it if the price is right, they made around 15,000 of that model, so there are reasonable supplies of parts out there, at reasonable prices.
Tracks and bottom rollers are often shot on old Cats, so it's worth looking closely under the old girls skirt, particularly if she has a blade on her, new gaskets are available for pretty much the whole tractor, piston rings can be made for around $250 if needed, new radiator cores are around $400 last time I bought one a few years ago, for a nice brass one, no doubt cheaper alloy one's are available, handles on the levers are available new from Cat., and John Hahn makes really nice seat cushions for them.
Typical issue seems to be fuel pump is shot, but those tractors run fine on a gravity feed system unless you are in the hills, and the other issue I've seen here is the fuel tank bases rot out, but they have a smaller gas tank within the main fuel tank you can use, but that only holds enough gas for maybe a hour, the 22 is a little gas guzzler, it will burn through a tank of fuel in under 10 hours working, but they are a really nice little tractor to start and drive, with very light controls.
They were designed to run on cheaper tractor fuel, like power kerosene, you start them on regular gas out of the small tank within the big tank, get the engine warmed up, then switch over to the main fuel tank.
We all like seeing pictures here
Good luck
Mike