I may choose option c before it is all over. I love the server and it is very well appointed, but would be better off hosting a slew of VM's for someone. Like I mentioned above, I can get broken screen i5 laptops all day long for cheap and just make them headless units with a built in battery backup!
Laptops have several issues.
1) cannot hold a 3.5 drive...local storage is best.
2) many cannot auto restart after power is back on
3) easily removed from the premises...and something that is often taken during a burglary...desktops are generally left alone.
4) depending on your load, may not have sufficient power....