Can be a good earner. Mate of mine buys 1000 each year, tups then, lambs them, weans the lambs, culls the ewes and fattens and sells the lambs. Repeats each year and does well out of it.
Edited to add - it might be worth noting though, that I've just been asked to go out with the dog and catch some escaped welsh ewes and lambs lol.