SketchUp artist and garden design worker

I create 3D realistic garden designs for customers. I am searching for a person who can go out to client's gardens and perform a site survey and create a basic model in SketchUp. I will then use this model to create their new garden design and render using Lumion. This will involve measuring the house exterior and garden dimensions. They will also need a reasonable knowledge of horticulture. Payment will be on a job by job basis.