Hiring online freelancers: Fiverr, Upwork, Freelance

Not sure where to put this thread, and thought I'd seek some Beyond advice.

Where would you guys go if you were tinkering with product designs for shits and giggles for one-off projects, so you're just going to utilize these modern freelance per piece online services:

- industrial design
- draft
- material selection
- prototyping (i.e. I notice quite a lot of freelancers got the 3D printing nailed down, each with their own expertise based on browsing their profile)


Thanks Beyonders, thought it's worth asking.