What I want to tell the OP is that if he wants to put the bow in the bow, well put it, he will know why and where. Like any other type of boat, the cabin should be where it is most convenient, depending on how you want to use the boat. It must be taken into account, for example, that in an environment as hot as the one in the Red Sea, the closed cabin will be small, placing, yes, an awning or canvas on the rest of the deck. There are many factors to take into account that only the OP knows about. If he doesn't tell us everything, we can only speculate and give him advice of doubtful use.
On the other hand, it seems that the OP has already found advice from a builder, which will lead him to design a ship that is closer to what the builder normally makes than what he originally thought. That is to say, he will have to adapt his needs to the builder's boat to which only small changes will be introduced without, I think, lowering the total cost.
On the other hand, it seems that the OP has already found advice from a builder, which will lead him to design a ship that is closer to what the builder normally makes than what he originally thought. That is to say, he will have to adapt his needs to the builder's boat to which only small changes will be introduced without, I think, lowering the total cost.