Not to mention tailwinds and beautiful Swedish massage girls at a free cyclist sauna every day?
You also don't say when - - April & May? May & June? Later? Makes a big difference.
Also, where you start and end your trip may add a day or two on each end depending on transportation.
(BTW - Are you allowing any leeway days / rest days / weather days / Montezuma days etc.?)

Yes, with planning you can find excellent routes almost anywhere that are direct and meet your parameters.
The advantage with ACA maps is that they are already planned out for you - but you have to stick to their routes.
Depending on time of year, you can easily map out a direct coast-to-coast.
I've done it many times.