I found some photos on Picasa of a Mangalitsa farm. The photos start here. You can click the right arrow and view all of them.
I like the photo above - you've got the man's eyes and the pigs eye's lined up - they both are looking at the photographer. That blond pig is very cute!
It looks like they farrow indoors with pens. The pens look old and hard to keep clean. That sow is standing up, ready to bite.
You can see in this next photo the pigs have a hole allowing them to get away from their dam (aka "mother") - their greatest danger. You can put particularly rich food in that extra space and only the pigs can eat it.
One thing that's clear from the photo is that the little pigs run around very quickly.
As this next photo shows, walls don't have to be high to contain pigs.
I don't know what sort of stalls they are using in this next photo. You might think it was gestation stalls, but if so, why all the straw? That will just gum up the manure system. I'm guessing they have some special feeding stations for the sows. It looks like they've got a row of 30 of them or so.
It seems clear to me, from looking at it, that they've a pretty big farm, dedicated entirely to Mangalitsa. It doesn't look anywhere near as fancy as the intensive Iberico farms, but they might be competitive if their staff is on top of things.