It's very helpful having other views to bounce off, it's helping me work out what is good and bad about the idea for us. So thanks landroverroy, and please do chip in other folks. (Even if I'm only going to debate your point, it's really helpful!

)
I am attracted by not having to bring animals on for a year. Buying at the mart doesn't appeal at all, though I had originally intended to buy a lamb of an interesting fleece breed direct from its breeder, or borrow (hire) a ram from a nearby breeder as we did last year.
So actually, this feels more 'self-sufficient' too - all the meat we eat is home-bred and home-reared.
I'm now even wondering if we could do this routinely, minimising the number of years when we need to bring a tup or tups in.
Skyhawk's only related to his mother, and to any ewe lambs we keep from this year of course. They won't get bred until 2019, so I could use him on everyone I want this year, although I probably wouldn't use him on any first timers as he'd be bigger than the two candidates from last year. But they can wait another year, and I'll get a smaller tup for them and any keepers from this year.