HINT:
If you already have Asrock H110 Pro BTC+ or BIOSTAR TB250-BTC PRO you have better chance to find out how is that 10 gpu (amd or nvidia) build can be done with windows 10 enterprise ( let me help you a little bit , its a 2016 LTSB )

Oh I see, luckily I read through every single comment in this post, and really appreciate of your hint. Seems like new windows version supports more than 8 GPU, anyone know what is the max?