As a side note on the T110. If you know how to add memory, you can save a couple hundred bucks adding that 8GB yourself. They charge $178 for that additional 8GB. It's about $70 for 8GB at most places. Also, I don't think it comes with a redundant PSU.

SBS Essentials isn't that difficult to setup. You can find the instructional videos down below.

For networking, just run a few lines of CAT6 cable to each room. Always put extra. You can find college kids that can do this. It's low voltage wiring, so it's pretty easy to run. A nice gigabit switch too. I'll say 24 port just to be safe.

Additional things you'll want to get:
  • UPS as backup power for a safe shutdown
  • External Hard Drive for backups