It seems like bandwidth will be the problem for any SDR device. There are some other alternatives:
1. A device designed to operate over the internet, such as the Cloud-IQ from RFSpace (http://rfspace.com/RFSPACE/CloudIQ.html
). That doesn't help you with your SDRPlay, but it's a SDR designed for internet based usage. It does the decoding work in the SDR box itself and sends the decoded results over the internet. It's a solution, but a costly one ($630).
2. SDR Console SDR software from Simon Brown. I don't know if his new version 3 supports client/server mode, but version 2 did with any radio it supported. The software has both server and client modules. Version 2 worked very well. You can dig for more detail on his website: http://sdrspace.com/
. His software DOES support the RSP. This doesn't help you as far as being able to use SDRUno, but it does allow you to use the RSP hardware.
3. Another solution from RFSpace is their own software for use with their NetSDR that provides server and client modules. It works with their NetSDR and (I think) a few of their other radios. Again, not RSP, but an option for client / server.
These are just a few options. Unfortunately, none of them are a direct solution for your request.
I know that client / server operation has been requested for SDRUno. I haven't seen any response from the SDRPlay folks about whether they plan to implement this and if so, when.
73 - David, AG4F