Print-Ready Oil Rig Model

I already own this fixed-platform rig model (https://www.turbosquid.com/3d-models/3d-fixed-platform-model-1429144) in .max, FBX, OBJ/MTL. At the moment it is built for rendering only; I need it turned into a 3d print file that can be printed at exactly 825 mm tall... (Budget: £20 - £250 GBP, Jobs: 3D CAD, 3D Design, 3D File Scaling, Slicing & Print Preparation, 3D Modelling, 3D Print Design)