What exactly is the uncle attached to: really to these specific rooms, or would a replacement on the same property also do, for example as a right to occupy the guest room with a one-week notice period? Especially his refusal, regardless of the offered amount for the waiver, sounds strongly like an emotional issue. Was Aunt Martha’s deathbed in the mentioned room, or was even his own home birth there? I definitely find the advice of a personal conversation best. Can obstacles be removed so that he can come again, e.g. by organizing a social nurse for the duration of his visit? I would try to infect the uncle with the joy over the renovation of the house, which apparently holds great significance for him. Presumably, at the time of an inheritance case, he traded this small piece of housing right precisely for waiving a financially paid share of the inheritance. Can a [Bilderstöckchen] be built in the garden where a candle is lit for the former testator? Jurisprudence is a pair of pliers that cannot grasp sentimentalities – but that does not mean that a mediator could not untie the knot. Investigate what happened back then (possibly with the pastor or still living school friends of the uncle in the area). Resistance is transformed by understanding.