Reusable Steel Urn Form Plan

I’m building a concrete urn-style flower pot that finishes out at roughly 30" × 30". To pour it repeatedly I need a fully-detailed fabrication plan for a four-piece steel form held together with bolting flanges... (Budget: $250 - $750 USD, Jobs: 2D Drafting, 3D CAD, 3D Modelling, AutoCAD, Building Architecture, CAD/CAM, Engineering Drawing, Fusion 360)