Beef cattle don't need you! If they have water and graze and tight fences they are fine in most locations for long periods.
BM, not sure where you live... Cattle do not need contact on a daily basis, but be warned they may be a little on the wild side with once a week visitation...Which breed does well left alone for 5 days at a time? I live 2 hours from my BOL so transporting our livestock we have at home will not be feasible. We need something that we can put at the BOL, feed and water weekly, but that will be left alone through the week.
The livestock at home will be slaughtered, prepared and packed in the days leading up to our BO.
I can tell you that if you have a herd bull they can take care of predators. A buddy of mine had 3 german shepherds go after some calves, none made it out of the fence and there was blood on the horns of the bull. When you are up close to a mature bull it reminds you of a short buffalo with longer horns.No personal experience with the breed yet but I am considering getting a few of the highland cattle. http://en.wikipedia.org/wiki/Highland_cattle Supposed to be especially hardy and their hair can be used for spinning. Supposed to be esp good at dealing with predators and a leaner meat. Big ol horns on em may make them less desirable targets of rustlers as well as being unique would be harder for theives to sell them so again less likely to be stolen.
Probably cost a bit more to get started with them unless there is someone local already raising them.