I believe the easiest way to get on tour, if you have the game of course, is to Monday qualify.
Most tour events have the Monday qualifiers for $400. The 4 lowest scores qualify for the tournament that week.
Then win the tournament. That gives you a two-year exemption on the PGA Tour.
Welcome to the PGA Tour.
If you did well in the tourney without winning, say a top 10 finish, you could always try to parlay that into sponsors exemptions.
Zach Johnson was doing Monday qualifying as recently as 2002.
I think winning a Monday qualifier would be a HELL of a lot easier than playing Q-school. The only problem is, when you Monday qualify and get it, you are playing for you tour life against the PGA Tour players.
But if you try this at a smaller tournament, the Greater Milwuakee Open or something like that, at least you wouldn't be up against the "top" names.
Or, as mentioned before, qualify against amatuer competition for the US Open, then win it. I think that gets you 10 years exempt on the PGA Tour.
But, for $400, you could theoretically Monday qualify, get in, win the tournament, and have the plans for your next to years taken care of. It'd be time to contact IMG and try to get some sponsors.