For reference, I just pointed my antenna in the attic towards the nearest metropolis, picked up 108 channels, sent them to an HDHomeRun box that sends them to Plex which handles the guide data and DVR to an SMB share.
It took a couple hours in the evening, most of which was just fiddling with the antenna mount and scanning the channels. It’s a lot easier than it used to be. Granted I planned and ran ethernet to the attic years earlier, but it’s not rocket science.