Answers will be all over the board on this. In my opinion, the cheap cost of getting in is absorbed by the hit on the calves. The beef cow will always have a higher salvage value than the LH cow. Your gonna have cash tied up in both of them either way. Why not start with one, that's going to gross more on calf sales, and salvage for more when her days are done?
I've had my share of longhorns around. It's kind of a necessity of what we do. They'll weigh a 150 pounds or more less at weaning, and be 50 cents back from the same beef calf. You do the math on em, and they just don't pencil out.
If you want a bunch of cows cheap, that give few problems, and will be with you a while, then it's the way to. You won't be making anything though. A charlois bull will hide "some" of your problems, and the old char genetics would add a few pounds. They won't fix everything.