Then don't make a pcb board, just buy an experimental board with holes. It's economical and convenient to change by soldering with plug-ins and connecting with jumpers, each of which is only a dozen dollars. The price of pcb varies greatly according to the number of layers. For example, for a four-story board, the cost of testing and engineering is thousands of dollars, so it is not cost-effective to reduce the quantity. If you must do it, choose a single-layer board.