I'm probably reading too much into these facts, but I am noticing a likely pattern here.
KM was born & raised for her first years in Wynnewood, PA; her father is reportedly a carpenter & a volunteer fireman. According to Wikipedia, Wynnewood straddles two townships: Lower Merion, which WP describes as having " the 5th highest per-capita income and the 12th highest median household income in the country", & Haverford Township, whose per capita income figures aren't much lower. Her mother divorces her father & ends up marrying a stock-broker.
Last I checked, while many carpenters do make enough money to raise a family on, very few make enough to fit into an affluent locale like Wynnewood. And stock-brokers do make a lot more money than carpenters -- & sometimes live in a community like Wynnwood, although in KM's case her step-father moved them to Wynecote. Wyncote also appears to be pretty affluent, too.
I wonder just how much money played a role in the life of KM during those few years before she left her family.
BTW: Does anyone know if KM's father is still alive? (I tried to search the county records for that part of Pennsylvania & only discovered accessibility to court records vary greatly by county.) If he is dead, I wonder if he died around 1995, when LEK is no longer known to be renting a mail box.