3D Interior Design Renderings for Gym Layout Design

I am looking to develop a long-term relationship with a designer who can create high-quality gym layouts and renderings for my customers, across Asia. Preferably I want somebody who has experience in doing gym layouts already. The individual should be competent in 3D interior modelling software such as Revit, Pcon Planner or SketchUp and render gym layouts. We have the 3D icons of the products as we are the manufacturer of fitness equipment. Minimum work is approx 5-10 hours per week. I am based in HK. Thanks, John