After tonight's episode it's obvious to me that Jane himself has lots of wealth. His house, right on the beach in Malibu Bluffs is all closed up & vacant while he lives at the CBI office. The only guy with the money, charm, smarts good looks and smile like Patrick's is Walter Mashburn. I also thought it was a HUGE clue that WM slept with Lisbon- to me it seemed like a show of control over Patrick's closest friend and confidant, Lisbon. Remember that Patrick was intimately involved with Red John's former lover, Loralee. Lisbon doesn't seem to have a romantic life so seeing her in bed with WM surprised me and no further mentionl was made out of it. Very odd.
I hope it's not some huge conspiracy of cops and FBI as they keep hinting at. Or followers of Bret Stiles. That seems so cliche'd. Personally, I'm tired of everything being seen as conspiracy. Let it be Walter Mashburn. And please tell us soon.
PS- The only other interesting twist would be that PJ is RJ. It would be hard rehabilitating him for future shows, though.