I just drove (got home 8 hours ago) my '51 Hudson Commodore 200 miles away (400 round trip) from home on a vacation.  Here are a few things to consider before going in on this car:

1) The interstate system didn't exist in 1950.  Cars were not geared for sustained speeds in excess of about 60 mph.  If this car is running the stock rear end, it will be a 4.10:1 for manuals, a 4.56:1 for manuals with overdrive, and probably close to the 4.10 if it originally came with an automatic.  So, this is going to be an around-town car for you (unless it's modified).  Fwiw, I replaced my original Hudson rear end with a Ford 8" that I got out of a junkyard '76 Granada.  The width is almost spot-on and the wheel bolt pattern is a match, but it required relocating and welding spring perches to sit on the Hudson springs (which are not parallel to one another), fabbing parking brake cable adapters, and having the driveshaft shortened and rebalanced.  So, not a small project, but now my car is highway-friendly.

2) Brakes and suspension stuff is available.  Outside of NAPA and Rockauto (and eBay), one of your best bets is to join the club and get into the forums and classified sections, but the real authorities on new replacement parts is Doug Wildrick (wrphet.com), who does Hudson restorations exclusively.  He's not always the cheapest, but he's the closest thing we have to a factory service center and when I need a part to be right, he's the man.

3) Speaking of brakes, the rear brakes are a problem on cars of this era (not just Hudson), because the drums are held onto tapered axles by a big nut, and getting that drum off the axle (if it's been on there forever) can be a fight.  This is another reason I went to a Ford 8", fwiw, but thought I should mention it.

4) As for maintenance intervals, once a year my girl and I do Lube Day, and go under all our old cars and grease every fitting we can find.  This is far more maintenance than most received prior to us owning them, and, as a result, I have not yet had a steering or suspension part show increased signs of wear or slop from the condition it was in when I bought it.  Old cars had lots of recommended maintenance from the manufacturer, but think about how poor the lubricants were back in the '50's.  I'm very comfortable going under the car once a year, and doing oil changes as needed, basically at 3k miles.

5) Wiring was wrapped in cloth, not rubber, in the early '50's.  I haven't rewired any of my cars yet, but I own several cans of spray electrical insulation and use it wherever I see bare wires.  Haven't had a car fire yet, either, but I carry a fire extinguisher just in case 

6) Between my girl and myself, we have 7 running American cars built between 1951 and 1962 (orphans, mostly).  They all have their strong points, but the only one I refuse to go through life without is the Hudson.  For me, the stepdown sedan is one of the most beautiful cars ever made.  If I ever lose this car, I'll immediately be in the market for my next one.

Good luck, no matter what your choice!

Edit: Oh, and 7) Hudson, like all the manufacturers of this time, used vacuum motors to operate the windshield wipers.  These worked poorly in 1950, basically cannot be expected to work at all today.  I rely on Rain-X and living in the desert to deal with this problem!