Cash Flow Modeling

Startup looking for an excel expert to help build out a dynamic cash flow model to use to understand current cashflow as well as budget forecasting. We use Shipmonk as our 3PL (bonus if have worked with Shipmonk) and collect unit level sales data on a daily basis. Would like to develop a system where we can load the Shipmonk xls sales files on a twice weekly basis, that then feeds in to our cash flow model which includes all costs. We have a cash flow model developed, but it's not easily updated and we would also like to create dynamic elements to allow for budget forecasting - impact on increasing marketing spend on revenue etc.