So at the end of the day, somehow the bills have to be paid. Many companies may "absorb" the cost of SolarWinds. I personally am at a crossroads where I want to
recoup the costs for SolarWinds, especially as I move the platform to a more application centric monitoring model.
The business (non -IT), development, and non-hardware users are already benefiting from our application centric model as large and complex applications and platforms move through the Development cycle, and are able to test their applications and services against the hardware they have built.
So, now I am looking for suggestions for a CostModel to recoup from Projects/Business the costs of SolarWinds. As a simple base model, one could simply add total license costs and divide per number of servers monitored - for an annual cost. I understand their is labor, SolarWinds servers, etc. also, but I am looking for any input that other SolarWinds Adminitrators have used successfully. Am also shamelessly looking to get out of begging for $$$ from one bucket as I expand my platform, I want my own bucket. 
Help very much appreciated.