Okay, yeah, driving it across country is my preference too. I've done five of them in two years. The first one changed me, and my life. The last one's ending coincided with another ending, and beginning, for me. The second was the start of something pretty great; the third was the continuation of it; the fourth was a monster of trying my nerves and hope. Here's to the sixth.
But enough about me - driving it across country is great, it's a beautiful vacation, a lovely drive, but it's not for everyone. Coast to coast is at minimum a 30-hour drive (San Diego, CA to Jacksonville, FL). More likely, it's something like 45-50 (for example, Boston to SF). In the absolute best case that's a solid two day's drive; two and a half or three is more likely, and that's if you're willing to drive a thousand miles a day.