Haha!
So let's start working through this as a refresher.
Biggest thing from yesterday...
You still think it's a good risk not to have a second domain controller. I was able to stop the paperwork, so that will indeed save me $800 or so on a license and a few thousand on another server.
The only other thing I thought of was that if the server goes down, I lose my DC, and files serer, and mail server. But this new thing should be pretty darn reliable, so that's probably a good risk to take as well.