Setting up Square Restaurant POS System

My current Square for Restaurants It includes cafe, bar, wine, spirits, liquor, wines, gelato, juices. It needs to be able to order from tablets. Hardware available are 3 terminals 2 tablets. 5 handheld terminals... (Budget: $1500 - $3000 AUD, Jobs: Data Entry, Data Management, Database Management, Menu Design, Project Management, Software Development, Software Engineering, Software Testing, System Administration, Testing / QA)