See my post here which has some links to information about the process & what’s required in your CAD drawings to get something manufactured: Modeling a yoyo for manufacturing - #3 by MarkD
There are many options for a machine shop, you can expect to have to pay $400-$800 for prototypes made in China, eg. at FPM.
I also enjoy talking about yoyo design on discord here: MK1 YOYO CLUB