If they allow this they don't care about the security regarding any code or IP you generate or any data you use, in which case it is strange they don't just put you on a separate, less restricted part of the network, or give you a box there.

Also, a DO droplet would be cheaper (and with unlimited hours); you can have a droplet running a vnc server in a couple of minutes (and clone it afterwards), with any DE you like. Don't know about how the (cpu) speed compares though.