Hi,
I haven't tried VSimRTI with LTE, however I have used it both with internal (SWANS) and external (ns-3) network simulator (the WiFi part).
As far as I remember, the use of NetDevice should not be a burden in your simulation, as the VSimRTI guys said, they use the same stack on top of that (Application/Network).
VSimRTI controls the mobility of the nodes (through the interface with SUMO), the traffic generation (through the Java ApplicationSimulator) and it uses network simulators to achieve communication. I don't know how you would install a VSimRTI application in a 'remote host' though. Haven't seen such scenario. It would be only V2V and V2I (road side unit)
Regards
K