NAV 2017 on prem licenses & setup

Hi is it possible to purchase licenses on a subscription basis for nav on prem, (if so how's the pricing work)

also can you simply download the latest version of nav from mibuso, set it up on prem, install a full license instead on the cronus one on the dev environment, setup a new company in the client and away you go, no date restrictions etc?

finally is it possible to become a microsoft network partner and sell yourself a nav license? or is the a partner level where microsoft give you a IUR license for internal use of NAV