Do you have any impression of the approx resources needed for a up to 20 people team to use NM terminal server.
This depends on what you you want to do 🙂 What applications are the users going to be running? Some basic guidelines are here: https://www.nomachine.com/AR03L00794
How about the clustering – do we need to buy 2 licenses of it to use it a HV in a cluster mode.
I take it you mean High-Availability. In that case you need Enterprise Server (or Cloud Server if you’re interested in browser-based access). You will need two licenses.
Is it possible to use the NM linux terminal server with the free version of NoMachine client (the idea is that our employees to have the possibility to use their own virtual private desktops mostly for browsing the internet).
The free NoMachine package (both client and server together) can be used to connect to any of the pay-for versions. There are licensing restrictions on the use of the free version within commercial environments (see http://www.nomachine.com/licensing) If you want just a client package (so access to the desktop on which it’s installed won’t be possible) then you can try Enterprise Client.
If you need any more info about pricing, I suggest you contact the Sales Team (Contact Us -> Sales enquiries, they will be happy to answer any questions.