Sorry about my lack of clarity.
I intend to ride across the county - to Portland, OR and then on (probably to Astoria).
I will not be following, for any length of time an official ACA route. I probably will be on it from Monroeville across Indiana, and from Missoula down into Oregon.
I want to ride, more or less, as good roads will allow, from DC across to Peru, IL, and then up, maybe through the Black Hills or Bad Lands, to Missoula and then into Oregon.
I have 18 days to get from the Atlantic to Peru, IL (northcentral Illinois). I know this is not unreasonable, but in starting out, I'll not be in the best shape, and there's always other things.
I have 55 days to ride from Illinois to the coast - which I believe should be plenty of time.
I realize that in not following and official ACA route, my planning will be complicated. I have, in the past followed ACA routes (Illinois to Denver, Seattle to Denver, Oregon coast), but I have also, mostly, followed my own path. However, before I've not had time constraints.