I stumbled upon the link above and wondered if it's still relevant? It is dated 2011 and there might be newer information available, also including the entire ArcGIS Enterprise?
I know there are lot of info regarding Azure and Amazon hosting, but what if you want run your own? The BLOG above is pretty simple and easy to understand.
Here is a more recent blog, https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/arcgis-enterprise-in-the-.... The authors are listed at the bottom, if you click their names, you can see other blogs that they have authored. I hope this is helpful.