The majority of channels are really just coming from one direction (about 129 degrees compass heading). I would just point a high-VHF/UHF combo antenna (like the Antennacraft HBU22 or Winegard HD7694P) in that direction and see what you get.
If there are specific channels outside of that cluster that your brother needs/wants, then we can look into methods of fetching a few stray channels.
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