Watch The Ghost Goes Gear (1966) Official Trailer

Unbeknownst to the Spencer Davis Group, their manager is upper class, grew up in a haunted manor, and is called Algernon. When they visit his home, they find out that the family is broke, they don't have the money to pay the servants, and their home is going to ruin. Spencer suggests that they advertise the home (and the ghost) and charge admission.