Do you want to give all your part to someone who is going to build your rotator or do you would like to buy an already builded rotator ?
Or did you only had problem with soldering ?
At this time (I also done research by my self) but I didn’t found anybody who is selling builded kit… and it seem like some other people are in your case…
If you just need help for the soldering, i really recommend you to contact a fablab (in my case this is like that, that I learned), im pretty sure that there is one not so far from your location.
I you want to have something more simple to build for your student (I’m a student too ) I designed an all metal rotator “mecanics” that is mountable on every box that you can find, the design is way more simple than the Rotator V3 (so its way more simple to build), it also cost a bit less (100€ if you already have a box) You can read my topics about and it If you are interested i could give you the CAD file !