This has never been a good idea IMO. The negitaves are, they don't all breed, a heifer good enough to even think about breeding will cost you over 1000$ (here), if they don't all breed your going to lose money on the ones that don't, because your buying them to big to big to be able to keep 5 months on hay without feeding, and take back to the salebarn for a profit.
Another problem I see with it is, you can make the same money by buying something smaller to feed, without investing as much.
What do 2nd stage heifers bring in your area? Here a heifer like that isn't going to bring over 1250$. And that is about the biggest downside to it IMO. I'm don't like the idea of investing 1000 to 1050$ and 5 months for 200$, and have to take expenses out of that.
I may be wrong, your market may be better suited for this, but here it don't work.