That may have sounded a bit flippant, though not meant to be. I'm from an area where it is very common to have Charolais bulls on Braford-type cows, but the needs of my environment are very different than yours. Do you know how the market you intend to sell your calves to likes that type of crossbred calf? I now notice that you are way up there in the north country (ggg) where it of course gets hot but not humid and "buggy", so you probably don't need any Brahman influence in your cows or bulls. How well do the "smokies" sell in your area --- better than calves that are 3/16 Brahman? I'd bet they do, so maybe a good growthy Angus bull would suit you well in the future.
It's none of my business, but I'm still curious as to how you managed to buy bred Charolais heifers that cheaply these days -- is there a story there?