So my dad has 2 physical stores and has 1 online shopify store. We are trying to integrate them all so that we can efficiently manage inventory. All the POS systems from Vend to Lightspeed (are cloud-based)so expensive at around $200 a month and plus more for support, etc.. Is there any good stand-alone system that can use to integrate all the inventory? (currently using quickbooks pos) Should I just get an inventory mgmt system too? Any recommendations are welcome.