Community is a not good place to do those work for you. You can ask here, but since we are not familiar with your business requirement, the solution we raise might not be the best one for your fit. And in order to achieve the best result here, you will have some good knowledge to ask a proper question.
I would suggest u to get some help from others if you have no knowledge on SQL and ERP system.
If you think ur current consultant is too expensive, you find others, even myself.
Frank
