Must say i was very suprised at such a positive opinion of the soays, not what i usually hear.
Okay, if you want the negatives, here's one - killing and butchering costs are broadly the same for any ovine, whatever the size (at least they are around here), so your meat will cost more /kg to get from sheep to table than a more commercial type.
But you phrased your situation as though you were wanting small sheep that would be easy to look after - so that means primitives. And the only 100% self-shearing primitive, as far as I am aware, is Soay.
Have you thought about tupping and lambing? If you plan to breed, is there a Soay - or at least, primitive - tup nearby you could use?
Would stock netting and 2 strands be high enough to keep them in? Thanks again
Only if they don't want to get out!

Seriously, sheep that are content and have plenty of
varied grazing to go at are less likely to feel the need to exit the field they're in. Your paddocks are pretty small, so you'll be moving them around fairly regularly anyway. (If it's all rather samey plain grass, you maybe would look to give them some branches and scrubby stuff to pick on at.) You probably do want to try to get pretty tame, biddable ones, though - more likely to be happy to stay where you've put them, nibbling away and looking forward to your next visit with treats.

Note, I am a relatively new primitive-keeper - so others with more and longer experience than myself may come along and tell you different
