Hello,
i'll write in english is more easy to explain.
i'm interested in your project. i'm a Windows/linux system administartor. i have a windows certification on demployement and i've worked on similar projects for Avaya reporting in European Consilium in brussels.
i can install /configure your win 2016 server and setup VPN, web access, direct access, rdp.
i'll install the MSSQL server and will configure it to make reports for JTL-Wawi.
i'll tune your server as required at the end.
if you have any questions don't hesitate to contact me.
have a good day