Lenovo had/has a rail system to rackmount the C-series and also the D-series. I found a part #57Y4482, but that was not from Lenovo's website. If the S-series has the same height (which I believe it does), it should be rack-mountable also.
I think a home rackmount setup with a Thinkstation or two would be tops.
C-series and D-series are rack mountable with the correct rail mount kits. S-series is not rack mountable as it's slightly shorter than the others.
As for the virtualization part of it, nothing is officially supported at this time. The remote workstation is really a niche market right now, but it is growing. Each implementation has it's own issues, particularly with performance/latency.