I would go for Kune Kune or (dare I say without a load of abuse

?) micropigs. The reason being that they are smaller and would take longer to totally trash your fairly small area of land. Conventional pigs will have it turned over in a couple of weeks and then look around for further entertainment.
In addition, you will be snowed under by pork and pork products if you go for larger breeds. The smaller pigs take longer to mature but have a far superior flavour.
I had 2 micropigs that I had turned into chops, sausages and beefburgers, and they were (and still are) delicious. But they absolutely filled one and a half tall upright freezers. To get 2 conventional pigs killed at the same time means you will have an absolute mountain of meat to get rid of.
They do not need a wallow as you have plenty of shade. You can always hose them down if it's hot.
By the way kune kunes and micropigs are available at little money if you keep your eyes open. I was given mine, and I advertised some on here a few months ago for free and there were no takers.