RebE: between Rashi and Tosfas whether to place the mezuza horizantialy or verticaly
your compromise is that you have a mezuza at the angle that nobody likes. We just put 2 mezuzot. Or you can have 2 entrances and multiple rooms with mezuzot at random angles. Or no mezuzot, as shalom bais is a bigger segulah than mezuzah.
CTLawyer: ‘uninvolve’ your families
There is another wise advice – let (mothers)-in-laws take a position to support the other side of the family in the dispute.
One old book on ethnic psychology in the chapter on Jews says that the Jewish families differ as, instead of each person following advise given to him specifically, start all discussing roles of everyone else. Like this room.