I firmly believe you will want a generator in the 5500 continuous watt range. I've sent you a PM with my reasoning.
My beefmasters, though gentle, don't confuse people and coyotes/dogs... they will RUN/ATTACK threatening cannines. (part of the hardiness criteria)
Yes, if your cattle are too familar with you/humans, they absolutely begin to treat you like another bovine. If you bottle feed a calf... it will come up and butt you, just like you were its mother, in an attempt to get you to feed it... cute at 60 lbs.... agony at 600lbs... deadly at 1400lbs... and, once the respect/fear is gone, it can't be regained.... if you try "punishment" then the stock turns "mean" ... think about it... calves/bulls /cows push each other around.. .it's gotta hurt their heads, etc... so, pain is not too much a deterrant... they just wait until you are looking the other way then wham you..asserting their dominance, just as if you were a bovine looking the other way. their mental calculation is that they are dominant unless they LOSE a pushing/shoving match...
If you haven't figured it out, many, many people who want to come out and look at your stock will have NO CLUE about how to behave around them... dangerous, dangerous. Little kids can squeal and run into the herd triggering fight/protection responses from mamma cows... guests can not watch/read what is happening with the stock and be in the wrong place at the wrong time..actually, this is almost always the case... I don't know how to teach a person "cow sense" ... it's something that you just learn over time... how to stand, how to look, where to position yourself, how fast to move, when to stand, when to move... when to wave your arms, when to throw your hat into the face of something.
Oh, by the way... I have a 5 foot PVC pipe, about 2 inches in diameter, schedule 40, that I always carry when I'm messing with cattle... amazing how it makes your arms longer and keeps you safer... you can reach out and poke stuff, protect yourself, bang something on the horn, the nose, it's great both in the pasture and in the pen... never mess with stock without it!
my opinion, your experience may vary (but I doubt it).