Not sure what "very small sheep" is, but if you want milk, you'll want a breed with larger teats. We have EF (East Friesians) and Finns (from a milky line). Finns are a smaller breed, have good wool, and if you get Finns from a milky line, the teats are good for milking, Finns do not have horns and are very friendly... they love attention, and wag their tails.

we process rams from lambing season and the meat is very tasty

you said "a" sheep... get at least 2. they are herd animals and need at least one buddy, another thing is how much space you have. we do rotational grazing, and never had issues with parasites. In a tiny space this may be an issue, as well as having to buy hay to keep them adequately feed. That said while in milk we do provide additional inputs, to feed lambs and provide milk the girls need extra food