So I assume that the cue tones are standard DTMF audio PIDs? If so, buy a a few STBs to provide the DTMF audio for the automation and another for the programming.
No need for an expensive commercial receiver to provide combined programming and control signals when tones and programming could be provided by a few nice consumer STBs like the Amiko mini RE's or even cheap no name STBs...
Another option is to use a commercial receiver with ASI or LAN stream and cherry pick the PIDs. Maybe the GEOSATpro rack models if >$1k is in your equipment budget.