Actually really well. Kaczyinski basically got turned in by his brother and Eric Rudolph hid for 5 years in the wilderness living off the land occasionally scavenging in dumpsters for leftovers (which is how he eventually got arrested by a rookie cop who thought he was a burglar). Rudolph subsequently wrote a book describing his extended hideout.

I doubt la Holmes would last long in this kind of life, but unlike those two she had access to huge amounts of money and the capability to stash someI think she could have pulled it off easily; she would be at greater risk from encountering a professional criminal that would pick up on her furtiveness.