> I've seen people tell me to get a 5GHz capable AP and a dongle. But this shouldn't be needed.
You can't have the cake and eat it too: 2.4 GHz propagates through walls, so you share the spectrum with your neighbors; 5 GHz is much more easily blocked by walls, but that also means you have the (much larger) spectrum to yourself.
> 5GHz doesn't go that far, so I'd need to buy an AP for pretty much every room.
Well, for every room that you need a stable connection in. If you can see your neighbor's signals that well through (presumably) multiple walls, I suspect that you'll also be able to cover at least one extra room per 5 GHz AP so that calls don't drop while you're moving between rooms.
You can't have the cake and eat it too: 2.4 GHz propagates through walls, so you share the spectrum with your neighbors; 5 GHz is much more easily blocked by walls, but that also means you have the (much larger) spectrum to yourself.
> 5GHz doesn't go that far, so I'd need to buy an AP for pretty much every room.
Well, for every room that you need a stable connection in. If you can see your neighbor's signals that well through (presumably) multiple walls, I suspect that you'll also be able to cover at least one extra room per 5 GHz AP so that calls don't drop while you're moving between rooms.