Do some 3D Modelling

I am looking for someone to do an auto-cad design and a detailed graphic rendering of a male sex toy idea i have so that i can use it to file for a U.S. Patent. As well as use the rendered CAD file to make a 3-D printed representation of the toy. I will not say what the idea is here, i will only tell the person i hire, and anyone interested needs to understand that you will have to sign a confidentiality agreement, and agree that you will not try and use, sell, copyright, patent, or otherwise try to gain financial, personal, professional gain, nor give, sell, trade, or allow anyone else access to the work done for me on this project, whoever i hire i will email a contract for the above terms to them, they will sign it and scan then send it back to me. I will also have them sign a document stating that they agree that they emailed version of the contract they sent back to me is legitimate and they agree to use it in place of a hand written document. The toy will be a water toy, and we are wanting to get a great detailed design so that we can file for a patent as well as start production as soon as possible. Were a new, small company so our budget is very small and very tight.