In the top image I pointed out that above the fire is a support beam. Being that heat rises and inevitabley so do the hot embers and smoke, I’d say the fact that this is a support beam means that it would be a fairly weak support beam. Heat would warp the wood or cause cracks/strain. The other thing of note is that you just have meat hanging by hooks and… By the support beam no less. Take a look at these images of cooking:
Notice a few things.
One: meat is hung usually across pegs or hooks to dry/cure. We have definitely hung meats like you have with chains. so I don’t really have an issue with that specifically. But randomly hanging from a support beam above a fire to cook isn’t only innaccurate, but would probably cause issues.
Two: fires have racking above them for hanging pots, griddles, or in your case, spits for roasting meat.
Image Two: I really don’t like stone foundations being uneven or just coming to a stop with grass blocks like that. And also, while a stone block floor is nice for a butcher and though it may be debatable whether this butcher could afford a fully stone floor. I must say, at least add some variety. The floor needs to maybe be a mix of cobble, packed dirt and dirty cobble. It will give it a much more rustic and defined look at least.