If you are buying new or used or refurbished, a few things I suggest for use in a
commercial environment:
-If you are purchasing a new Mini, order it with 16 GB of RAM and a smaller SSD.
If you are purchasing a used or refurbished 2012 0r earlier, upgrade to 16 GB RAM
and an internal SSD. The main reason for the SSD is long term reliability (no moving parts).
The suggestion for 16 GB of RAM is to allow multiple services to be run simultaneously
and room to expand additional services later.
-Install only the OS, Server, an any additional software required to deliver or manage
the services that your Sever will provide.
-On 2011 or later Mini models, I suggest getting multi drive Thunderbolt enclosures
(OWC has quite a nice selection of them). They can be set up in RAID configurations
as mirrored drives (redundant) so there will always be a backup. I suggest Thunderbolt
for reasons of speed. On 2012 or later Minis, you can make use of USB 3.0 drives instead of
Thunderbolt.
Which ever external drive route is taken, that is where you will store all of your data. Reason for this
for ease of replacement and redundancy. If a drive dies, you would simply switch to the backup,
unplug the faulty drive and replace and restore the data to it.