I have a friend who has a creepier first date story.
Yes it is easy to just disappear but you have to be willing to make the sacrifices of having contact with literally no one that you use to. Does 100k cash justify it? Maybe yes, maybe no. You'd definitely have to invest some of it to get a return because working anywhere generates a paper trail. But, like everything there is ways it can be done.
And the above story? To make a long one short, a friend of mine was at a club and this guy wanted her to go home with him. They made out and fooled around in and around the club but she didn't leave with him. A couple of weeks later she developed extremely bad breath and felt super sick with a list of symptoms. Went to the Dr. said it was a rare disease that is only developed by eating dead and decaying flesh...typically human.
They contacted the police, went to the guys apt and he had been killing and ate the flesh of one of his victims.
http://www.websleuths.com/forums/showthread.php?t=12371