I don't grass finish, I grain at 1.5% as well as rotational graze. The ones I have now will finish pretty much on just grain. Right now I only need 5 or 6 a year to direct market, hoping that will grow in the years to come. With my day job I worry about calving out cows bred to unknown bulls, I'm not home all day and leave early in morning so evenings are when I have time to fool with them. I'm afraid I'd lose too many by not being around to calve them out. And if I only ran the calves I finish I feel like I'm leaving money on the table because I'll have alot of pasture that wouldn't get grazed. I realize cow/calf pairs are gonna run higher than breds but it's a little more peace of mind and one less thing to worry about not having to calve them out. My hope were that if I bought some that were thinner that I'd be able to add value to the cow and get alot of my money back out of the deal when I sell her. I figured by not having to winter cows, you'd do alright considering you end up with calves but no wintering cows.
I just bought more acreage that joins me so trying to figure out something to go along with the direct marketing to graze the extra ground. In the past, every time I've tried buying some good cows and keeping my own cow/calf pairs, seems I always lose money that way. When your not running many head,losing a calf or two is detrimental to the operation. And then when you cull the cow that lost the calf, if you haven't had her long you lose your shorts on that deal too. I've got some longhorn type mamas that I bought cheap that had calves by black baldy and I bred back to ultra black, but they're not a long term deal, just bought them to make a few bucks and move them on. I've thought about stockers but the margins are really tight on that. If I were selling more volume I'd definitely just be doing as you said and buying off color stockers and finishing out.