Please don't do it! The cheaper animals often have awfully bad fleece....and I speak from lots of experience
The price is dropping fast and many just cannot sell their animals and what with the TB problems aptly put above....just don't would be my advice
So has the Alpaca bubble burst then?
Re sheep vs Alpacas - you can buy a hell of a lot of sheep for about a grand...
Most sheep if coming from a small flock will already be bucket trained, my Shetlands are really friendly, don't escape and have wonderful fleece. If you don't need to run your holding with the aim of making a living from it, a mixed coloured flock (and different breeds) would give you a lot of fleece to play with, you can eat them and if you live in :sheep:country your neighbours will be able to help and advise...