Bang worked for
Rentekammeret (as
auskultant) from 1799 to 1804. In 1800, he and his brother-in-law Christian von Eggers bourht
Benzonsdal from Jens Lauritz Barfred. Shortly thereafter he bought the brother-in-law's share of the estate. Fearing an outbreak of
dysentery in
Ishøj he made great efforts to keep the outbreak from spreading, care for the sick and bury the dead. In 1807, he bought Sparresholm at
Næstved. He converted many of the tenant farms to freeholdings and had a reputation for being a progressive farmer. In 1809 he established a facility for the preparation of
flax on the estate. ==Battle of Copenhagen==