No matter how much you plan there are variables so I don't think you can really solicit advice. For instance, some of the east coast travel hours you posted seemed off to me. It sometimes takes much longer traveling along the eastern seaboard as there can be a lot of traffic. Weather conditions and spontaneous things like heavy rainstorms can also lengthen travel time.I cannot imagine why you would want to subject a cat to such a vigorous trip. I moved and had to car travel with my cat a few thousand miles and she howled the whole time despite being lightly sedated.I am surprised, actually, that people still plan such long for "pleasure only road trips" as it is not really very environmentally friendly IMO. It is also quite fatiguing to drive across country solo. Not to mention it can be quite boring driving alone all day. Have you thought about a cross country train trip? I have done that and it is fun. You see the country, and you can go from west to east coast and then fly back. You also meet a lot of nice people and have time to talk while on the train.