Re: Enterprise version?
yes you can buy 1 copy of enterprise with SA. Phone Pugh and say "1 copy of W10 enterprise please" they will charge you about £350 or £100 per annum with SA. Note that enterprise windows 10 will not operate as "enterprise" without a domain (not in the way you want it to anyway). Workgroup W10 enterprise still act like W10 professional.
so you will need a copy of W2008+ server and a CAL for windows 10. This will set you back about £150 for a single server license (2 CPU if you buy the 2008 server, 2016 is now cores and has gone all fucking stupid) but it usually comes with 5 CALs. Then you need some hardware to run this on, a very small desktop will work just fine (the smallest PC I ever ran a server on was server 2003 on an OptiPlex 280 - a P4 with 2g of ram 32 bit). Set up your domain and group policies to remove what you are looking for and you are gravy.
I know at least one primary school that has purchased 1 copy of W10 enterprise and have an old small business 2011 server with only a handful of PCs and CALs. They use W10 enterprise because they are below the threshold to make education cheaper.