Review PCB Design before Production -- 2

I am a junior electronic and mechanical engineer. I am making a product for agriculture use. For this state, i need someone to review the pcb design before manufacture and give me the comments. Later, we will ask for the whole design of other boards, but for the moment is just an advisory. There are 2 boards of 4 layers and i am using esp32wrover.
My idea is pay by the hour. I dont really know how much time it will need.