I recommend you to use a blender, SketchUp, and Cinema4D I use these for 3D designing, I am also a designer infact for designing I especially bought a flexible desk for my work from Flexispot coupons, so I recommend these to you on the base of my experience.
The best 3D modelling software:
Cinema 4D R20.
Autodesk 3ds Max.
I have recently purchased a mac book pro with amazon coupon code 20 off and install these all softwares that running perfect and also good for 3d designing as I haven’t run any other softwares so I can’t suggest any other softwares.