You downloaded a file somewhere and you’re getting errors with the 3D Model? As a professional 3d modeler and 3d printing expert I can check your model and fix any errors. Prices for these checks vary starting at 25$ depending on whether it’s a quick job or something that might require further fixing, re-modeling, etc.
You found a cool Wizard miniature online but he is holding a darn wand instead of a staff? I might be able to help with that. Contact me via e-mail or Facebook, and I’ll quote you on how much it would cost.