Only drawback on the 8N with the loader is NO power steering. They are a beast to steer. Actually any tractor with a loader and no P/S is not much fun. Using brakes to help steer is a plus but still a pain. Haven't found anything I've needed that hasn't been available one place or another. Most pretty local. We have a Ford tractor dealer less than an hour away. Though most parts I get at Tractor Supply. If I needed just a tractor to use on the property I wouldn't have a problem buying one all done. (That Jubilee you posted would go for around $3500 here)
I just like working on them. Stress reliever for me. Most I've gotten for well under a grand. Most all have been running, just ugly. My 861 I got for $300 running and have a total of $1700 invested. Could sell to the right buyer for close to $5000 but I like this one too much to sell.
Honestly I would look for something after the 8N series for working. The 8N needs the PTO on to use the hydraulics. The jubilee (1953) and newer have live hyd's. If you want to bush hog you would need an over running clutch ($75) unless you find something with a live PTO.
Like Iddee says, JD tractors will eat you up in parts cost. I won't buy them.
3 Pt. I couldn't do with out. Way too many toys available for them. I even build some of my own.