When You Guys Need To 3D Models To Use With A Game Engine For Generating Synthetic Data, Who Do You Hire And How High Do You Set Your Budgets?

I’m looking to use 3D modeled fabrications of the expected areas wherein an AR app I am developing is to be used. The app incorporates object detection, object permanence modeling, and spacial tracking. It needs to operate in a variety of conditions: clean and dirty, cluttered and no clutter, poor lighting to great lighting, and cramped to spacious. I have identified areas at my workplace that meet each of these conditions, and I want to get a rough estimate of what it would cost me to have them 3D modeled both for synthetic data generation and product testing.