How can i build ServiceDesk Plus?

How can i build ServiceDesk Plus?

Hi Team,

I'm very like ServiceDesk Plus products, i would like to try and buy it but i cannot understand how do you count license? I need some features:

- 20-300 users in my system.
- 3 Techinicals
- I need this tool for I.T asset management and my be help-desk function.

So what must i buy?

                  New to ADSelfService Plus?