I'm well aware of how insane livestock costs are. Unfortunately, synthetic food costs are even more insane (and last time I checked, most depend on existing animal products anyway: https://en.wikipedia.org/wiki/In_vitro_meat#Challenges--take a look at the existing culture medium candidates, keeping in mind that fetal bovine serum is made from cattle blood): https://en.wikipedia.org/wiki/In_vitro_meat#Economic. Note that the person saying that it will be cost-competitive in ten years has a pretty vested interest in that being the case.

I'd be particularly wary of anyone citing vertical farms as being a cost saver: https://en.wikipedia.org/wiki/Vertical_farming#Problems.

To be clear, it's possible that these problems are surmountable. But frankly, it would be a hell of a lot cheaper (both economically and from an environmental standpoint) to change our dietary habits; meat with every meal is going to be costly no matter what.