It seems to me that the car might have actually been part of the kill kit. Was this the same car he was stopped in previously? If not, there might be some other "abandoned" car out there with his "real life" stuff.
Benbrook, TX, is where he got a ticket July 7, but I can't determine what car was stopped, or whether the ticket was paid. Going halfway across the country in 2 weeks is certainly doable, but it begs the question, "Why?" Sure, it is a straight shot up 40, but still. Of all the places to go, he picks that one.
In 2005, he payed a Clark County, Nevada, ticket... for failing to use hand gestures or something odd like that.
Echoing the upthread comment, how he arranged internet access is certainly one of the more important questions.
I was thinking along very similar lines....wondering if he had all those tools in the car because they were his most precious possessions. If he was basically homeless and living out of his car, maybe he kept them with him at all times, never knowing when he'd have to make a quick getaway, with all his items with him.
Also, that backpage list of names and numbers. If he didn't have regular access to the internet, maybe he would compile a list of several names at a time, to keep him fueled on potential victims until he could gain access to a computer again.