How do you get the output of the receiver to the input of your control board? Are you somehow converting HDMI, or are you taking the old-style analog outputs, or what? Is your station digital? HD capable? Is it over the air (LPTV) or cable-only or what? Those things might make a difference in the recommendation.
Another question is, do you air all programming "live" or do you want to delay certain programs for later broadcast?
And, do you have just one dish that will move (even if the receiver isn't responsible for moving it) or do you have a fixed C-band dish pointed at each C-band satellite you're receiving channels from?
There are probably a lot of possible ways to do this, but it all depends on exactly what you are trying to do, what kind of equipment you currently have available, what kind of budget you have, and how technically astute you are. You can buy cheap receivers for under $50 on eBay but they probably won't do much of what you want.
It's possible that what you really want is not a receiver, but a satellite backend system that can tune in the channels you wish to receive and either stream them live over your local network, or record them for later broadcast. If you have a desktop computer that isn't ancient sitting around, you could put one or more DVB-S2 tuner cards in it and use them to receive the channels. Of course this assumes you control board has some way to receive live digital streams and put them on the air, while still doing any required legal ID's and such.
I would say that as a viewer, I would not want to watch a station that does some kind of crappy digital to analog and back to digital conversion. We have a LPTV station in our area that I'm sure must be doing something like that (although I'm half convinced they are receiving the channels, playing them on a 1970's era color TV, and then pointing a cheap color camera at the TV screen and broadcasting that; the picture is unbelievably bad). I'm guessing that under 5K is not unrealistic PROVIDING you have someone there who is really into technical stuff, and it wouldn't hurt if they know their way around Linux and computer hardware.
I run a backend system in my home using TVHeadEnd and it's taken me over two years to get it working somewhat reliably, and even now and then I still have occasional issues with it (signal breakups, an attack of the purple lines, etc.). If I had used "professional grade" tuner cards from the start I probably wouldn't have had some of the issues I've encountered along the way, but like you I had a limited budget. And the fact that Linux and I don't exactly get along doesn't help. But still, it gives me a lot more versatility than any receiver I have ever owned, and despite the issues I would not go back. Unfortunately such a system is not the cheapest way out; even if you build the computer from parts you are probably going to want a good professional-grade tuner card with multiple tuner inputs (maybe something like
this). I don't know if such a system would work for you, or would prove too complicated or give you too many hassles in getting the signal to air, I just throw it out there as another possibility you may want to consider, particularly since a lot of receivers nowadays are cheap foreign-made models that may be fine for home use, since an individual user can deal with occasional freezups and other weirdness. But if you're looking for something that will work reliably (and particularly for remote or unattended operation) then those cheap receivers may not be the way to go, though some are definitely better than others.
P.S. I was still typing this when you posted your previous message. If you're still dealing with analog only, just keep in mind that almost all the signals on satellite are digital now, so you will have a loss in quality. If I were you I'd try to buy equipment that also has digital capability, so you don't need to go out and do all this again when your cable system upgrades. But I thought maybe you had a LPTV station with at least some digital capability.
