I'm leaning towards a very white piebald. The pics show some very light brown around the left antler and eye. And as you have pointed out, he doesn't have pink eyes. I may be mistaken but I think a true albino doesn't have any pigment at all so there would be no brown hair or dark eyes.

There really isn't any biological reason not to shoot him. Piebalds and albinos have a recessive gene. But then, if you like having him around, by all means hold off on shooting but don't expect others to if they get a crack at him. 40 acres isn't a big patch of land for him to stay on all the time. Don't be surprised if you see a pic of him in the paper with a smiling hunter next to him.