Hi Steve - which Hardware revision is the B210?
If its HW4 then yes the encrypted Speedfusion throughput is rated at 80Mbps ( anything less and it was about 30Mbps I think).
Assuming its a HW4 then yes - over speedfuson, although its more (150Mbps) if you turn off the encryption. Straight to WAN routing throughput is 350Mbps on a HW4 B210.
Not over SpeedFusion - Balance one maxes out at 60Mbps with no encryption about 30Mbps with.
You’d need a B710 which does 400Mbps of Speedfuson throughput to use 3 x 80Mbps of bandwidth fully.
No. But you will have to manually configure the SF VPN as IC2 won’t talk to an out of warranty device. You also won’t be able to remotely manage or monitor it via IC2.
Vultr. I do 10’s of Tb’s of Speedfusion through Vultr hosted Fusionhubs every month.