Having made the switch, I wouldn't go back.
Biggest saver is Labour, no longer Paying someone £10ph to sit on there **** in a tractor. Instead someone is following around strutting and wiring up.
Also mess, I will be able to fence 365 days of the year if I wanted, if we get a wet winter I don't have to worry about ruining a farmers field or rutting tracks.
It can be seen as a one trick pony, but at the end of the day, I am there to fence, so a machine that specialises in just fencing is what I'm after.