My billy went off for slaughter in February, aged 20 months and that was a bit late. there was loads on meat on him and it's delicious but it does need to be cooked very slowly.
I don't use electric fencing but as my goats are yarded rather than having a field, it wasn't too prohibative to have high wooden fencing. I also have Sanaans which don't seem to keen on escaping as others. British Alpines, on the other hand, make escaping their life work from my experience.
Remember you can always make cheese and yogurt from excess milk. I have yoghurt in the fridge right now and the first lot of curds is straining now ready for cheese.

Both are very easy to make.
Never having ringed anything, I got my vet to ring Curry when he was being disbudded. It only took him seconds and didn't add anything to the bill.
You presumably have holding number for your land?
Being a
bit lot of a goat addict, I'd say go for it.