I rode what I think is the cheapest real touring bike on the market (Windsor Touring $599 delivered) coast to coast (4244 miles on the Trans America) as did my two companions. We found it worked fine stock except we felt the stock gearing was too high so we spent $80 for a Sugino XD 600 crank. The quality of all components was fine the gearing was just too high. I also used that bike on my Santa Fe trail tour last Spring and plan to use it this Summer to do the Sierra Cascades route.
There are a number of bikes that are well suited to touring that are at a reasonable price point. A few are the Novara Randonee, Windsor Touring, Long Haul Trucker, and a bunch of others. All of them are fine stock if the gearing is suitable to the route you plan to ride.
BTW the Pacific coast is a great place to tour! Enjoy it.