external, i have a ubiquiti that the wireless guys from work installed. they put it on the roof of my house next to the radio receiver and aimed it across the driveway to the other unit mounted on a tripod on the daughters roof. works pretty nifty.
if you need something inside, you might want to check out this:
https://www.amplifi.com/
i know several people using these. set up the main unit then you can plug them into outlets around the house.
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