Consider moving to 5GHz and installing a few metal reflectors/surfaces to direct the signal that comes though doorways and other openings about the house. If y

Consider moving to 5GHz and installing a few metal reflectors/surfaces to direct the signal that comes though doorways and other openings about the house. If your ceilings are plaster you might be able to get up in the roof space and set up a bunch of reflectors to direct the energy though the ceilings and over the tops of the walls. The total cost could be a roll of aluminum foil, as used in cooking.