having put in embryos for quite a few years now, for ourselves and for others...there are a number of costs that the receipt herd incurs that aren't real evident...avg. pregnancies achieved is 50%, so 50% of the cows are at least bred on one cycle later....(lighter and younger calf at weaning), there are some embryos that do begin to grow, but are reabsorbed after a month or two because they die...then you end up with a really late calving cow or an open cow. We were told this by the vet who put them in...and put in a couple grade 4's (fresh) and that is what happened with those. As stated before, quite a bit of labor and some stress on the cows.
I don't think most ppl are paid enough for being a receipt herd.