Yes you can. Just get the cheapest version of it. The one without the RX in it. I forgot what the version is called but its the one that costs something in the ballpark of $150.
yes you are right but it's around two hundred bucks and it's the one you can run Spektrum satellites plus you can upgrade the software to get all the fancy stuff and you can run it on your Spektrum radio thanks
As for all the telemetry; more than likely not. I dont think specktrum and Vbar use the same telemetry protocol. I also beleive that J-Log wont work either.