 In 1927, Alvensleben married Cora von Erxleben and started to work at his wife's country estates at Tankow-Seegenfelde in the district of Friedeberg and at Dertzow in the district of Soldin, New March, in 1929.In 1936, he bought the forested estate of Viarthlum, in the district of Rummelsburg (now Miastko), Farther Pomerania.Alvensleben by now had two daughters, born in 1934 and 1936, and was a Knight of Justice of the Order of Saint John as well as a deeply religious Christian.