Hi,
A friend of mine raises sheep at her farm in Hampshire and sells them for butchering in the spring. No, you don't have to do it yourself. She delivers them to a slaughterhouse and then a butcher does his thing. You get it back nicely butchered, in a box. I think she said she sells thr lamb for $2.50/lb and then you pay for processing too.
I can ask her for the specifics again. It may take a few days for her to respond. The sheep are pasture raised. Grass and hay.
When I hear back from her I'll post details.
Mary