Christopher Panayiotou is accused of hiring men to kill his wife in April last year.
On day 17 of the trial against the PE businessman and two others, an emotional Inggs also told the court how he and his wife helped the couple to buy a new home.
He testified how he and his wife also assisted his daughter and her husband pay off her car.
Inggs explained how he and Christopher Panayiotou searched for his daughter following her disappearance.