can of worms here we come....
ok, here goes.
AI is a great option IF you... can afford it, can administer it - or are close & friendly with someone who can, can store it properly if needed, can clearly tell when Mrs goat is in standing heat. and most importantly, it is available when you need it.
not many goat owners will recommend keeping your own billy.
however... we REALLY struggled to find a local billy stud (our girl was late in season) and the one we did manage to arrange became stuck on a farm during a standstill - I think because of Bovine TB.
we found Cesar by chance and luck, his owner is local & lovely, she brought him, left him, and said if we wanted to keep him it would basically save his newly discovered Manhood, as he would have to be castrated if she had him back.
It saves us the yearly hassle of trying to find a local boy, and the transport problems. And separating the girls to go to stud.
Cesar was very timid, (though he is a right little poser!) which prevents him being bolshy with us - he's more likely to run away than square up!
And he is dead small - just a size up from a pygmy really.
so everything is in miniature - the smell, the showing off for the girls, the amount food etc!
For us, it was the right thing to do to have him, at the time.
especially with Margo dying, as Geraldine would have been all alone... she wasnt mated right away.
but we have just one girl, and one billy and one castraste.... where we'd prefer (and intended to have) 2 girls mated alternate years.
on the other hand, we need milk, not kids so its not important that they'll not be pure (even though Gera is pure - bred and Cesar is a registered pedigree)
If you feel you can house a billy, with a pal, and are prepared to double your feed costs for just one to be in milk (on the assumption that your poorly girl wont be mated) then get looking!
And will you want pure breed kids?
look into AI - you may be luckier than us, down in sunny Wales....
hope this helps... and doesnt just make your choice harder! and dont miss out on the local billy - even just as a contact!