for your route, i think it is a good idea to look at the aca maps. they aren't everyone's cup of tea, but they are fairly safe, straightforward, and scenic. maybe check out some journals at sites like crazyguy and make your own route or deviate from the aca routes a bit. if you're not totally attached to riding from ocean to ocean, maybe ride to boston from tucson and then fly to wherever and ride home.
continue to commute and train, and when you get time, take an overnight/weekend trip to someplace nearby. only you can know what gear you want and how fit you are. some people like to tour on special touring bikes and others prefer mountain bikes or hybrids. some prefer trailers, some prefer panniers. some prefer camping and cooking, some prefer motels and restaurants. you may find you don't need or want a gps or fenders or a different bike or a special case for the airplane (i suggest a cardboard bike box from your local shop.)