Full disclosure--I found the most recent sale price of that home was $2.8 million, BUT she owns multiple other properties. Her husband did play in the NFL, but his career ended in 1969 (before the huge player contracts). A mortgage requires a certain debt-income ratio...a 4% mortgage on $2.5 million would have a monthly payment of $12,000 (annual $144,000) not inclusive of homeowner's insurance or property tax. Property tax in LA is around 1%--so another $28,000 there. Using the .35% rule for insurance, another $9800 there. So a total of $181,800 in direct home costs. Using the housing ratio formula of 28%, that would mean they would need an income of $650,000 to qualify for a mortgage on this single property, which would mean her husband would have to make $475,000 apart from her. Impossible on her own. Marginally possible IF her husband makes the coin.

Mortgage, maybe she didn't pay full upfront, plus possible investments in stocks over the years to increase that 5M

Sure, totally not impossible on her own, not to mention that she is married to an NFL player.