My biggest regret with our bull is that I didn't disbud him when he was a calf. I didn't have a disbudding tool and so we just ignored the problem and now he has these horrible weapons.
I have a disbudding tool now, and we'll be using it in a few days with our new calf. Her little buds are just barely present so she's getting close to time.
I know what you mean about the nitrogen tank! We don't have any vets around here who will do that and we don't keep enough cows for me to justify spending the time learning, and buying the equipment, so we keep a bull. Maybe one day that situation will change.