Her father was extremely wealthy (around $8 million in today's dollars), but he was frugal. Whereas other wealthy people had indoor plumbing they did not. They didn't live in the rich part of town in Fall River, Massachusetts even though they had the money.
Neither Libby nor her sister liked this; they believed they were due a better lifestyle. With her parents gone (Abby was her stepmother), she and her sister were able to move to a new home with maids and a driver for their carriage. When she was given a verdict of innocent, law enforcement closed the case because they didn't believe anyone else committed the crime. The all-male jury said they couldn't believe a prominent young woman could kill people so violently.
Neither she or her sister married and they lived together most of their lives. At the time of her death, Borden was worth over $250,000 (equivalent to $4,938,000 in 2019). She owned a large home in an elite neighborhood, several office buildings, shares in several utilities, two cars, and a large amount of jewelry.
A maid who lived with the Borden's at the time of the murder, confessed on her deathbed that she lied during the trial to protect Lizzy. There was some speculation that she and Lizzy were having a hidden affair.
Who doesn't remember the chilling: "Lizzy Borden took an axe and gave her mother 40 whacks; when she saw what she had done, she gave her father 41." It always gave me chills.