Actually all your requirements are fulfilled and if you check my profile you will find more than 3 projects which had been completed with inventor (3D design and drawing) as I have more than 10 years of experience in design field (especially plastic, molds, sheet metal, metal parts and complete tools & machine), you will be offered 3 alternative designs for any new requested design, you will find my bid price is convenient as I need to increase my projects in freelancer.com, so as to say that you will receive perfect quality with good price