I don't think he was really funded before. I think he decided to do it on his own. Of course since one of the victims was a state senator it's possible some white supremacists funded him.
He was unemployed, lived out on his own and had the cash to drive to all of these white supremacists landmarks and take photos. Someone was funding him, but that angle was never explored by the press. They too busy digging up 20 year old dirt on OJ Simpson