I’ve haven’t seen many pool builders do something like this. If you had the ability to do one-of-a-kind unique pools like this you are significantly differentiated from someone who is just asking the dimensions, shape and decking style you want. There is no real way to compare your quote with the others who won’t or can’t do it.
Artistry is always a way to stand out. If it’s clear where to hire someone to do a task, your competitors will do it as soon as they figure out they are losing significant business because of it. With something like this, it’s not immediately clear who has skills for something like this.