Although Mr. Andreessen's father-in-law is quite wealthy* I'm guessing Marc didn't need to go to the in-laws for help to make a down payment.
From American Luxury, November 4:
Billionaire Marc Andreessen Pays $177M for Superlative Malibu Compound
....MUCH MOREInvestor Marc Andreessen bought heavily into the Malibu lifestyle this autumn when he dropped nearly $200 million on an estate overlooking Paradise Cove, according to The Wall Street Journal. The venture capitalist — who co-founded venerable Silicon Valley VC firm Andreessen Horowitz, a.k.a. a16z — closed on the property for $177 million. The transaction set a new record for a home sale in California; nationally, only Ken Griffin’s $238 million penthouse purchase appears to be higher. Both figures would have been eclipsed had The One in Bel Air succeeded in connecting with a buyer near its original $500 million ambition, or even subsequent $340 million price tag, but alas, that home is now facing a court-ordered sale.
Andreessen’s property, a turnkey compound, was sold by womenswear mogul Serge Azria — his brands include Joie — and his wife Florence. The Azrias spent a great deal of time and money revising the massive Malibu property to taste, and the final result shows an exceedingly warm, plank-clad modern-style main residence with striking high-concept interior architecture and walls and ceilings covered in hardwood, mainly white oak. A bit of playfully conceptual industrial can also be spotted in the shared living spaces....
*As noted in the outro from October's "Wealth Creators: The dynasties that gave birth to Silicon Valley.":
As just one example, Marc Andreessen was pretty successful just based on the Netscape browser.
But marrying Laura Arrillaga, daughter of John Arrillaga Sr., who Fortune calls "The secretive billionaire who built Silicon Valley" took it to the next level.....
