Korbman: What an incredibly informative and thoughtful post. I appreciate it! I'd already started factoring quite a bit of that, so another "set of eyes" on this is appreciated.

I'd come up with similar numbers built using an excel sheet that I've been hobbling together over the last week. I'm used to dealing with headcounts, salaries, project scopes and timelines....getting down and dirty with the most basic of economics is a refreshing change.

That's why I wanted to start with a small operation...made up of two different kinds of gear. See which is easier to setup and maintain and take actual temperature readings to see what we need to do about cooling.

My friend (referenced earlier, and in a video link that someone else posted) just finished a 500TH deployment with the S5, and the older 150TH they decommissioned was only a year old. So I need to factor in a yearly hardware swap. That being said, I'm likely to be in a better position with a particular manufacturer if I am already buying/using their gear.

Just checked the order status, and it looks like I'll have my S5s on Monday...no shipping info for the SP20s yet.