My tuners are Elgato HDHomeRun's I have two of them in service which gives me 4 tuners online, each with its own coax input. The software isn't great and the last time I checked there wasn't any way to assign a tuner to a specific channel. If there were I could assign one to the Channel 5 antenna, leaving the other three for the other channels. I'm a bit long in the tooth and my ladder climbing days are long gone. I do have a 40 foot mast with an old VHF/UHF antenna mounted on a rotor. If I can find an unused coax in all this mess (I also have 6 satellite dishes in the 'farm') I can try running a tuner off that antenna and swinging it around to see if I can pick up Channel 5. I bought a Radio Shack (Antenna Craft) HBU55 to replace it, but my brother-in-law who was going to do the job chickened out, so it's just sitting on the ground. Even though it probably won't do much better than what's up there, I'll have to change it to keep my wife happy (You spent $132 on that antenna so I'd have channel 5 and it's just sitting on the ground!?) If you are married you know what I mean...
Putting that up and a higher gain UHF antenna is another possibility, but I wouldn't do that until I can get at least a whisper of a signal with what I have.