Youthful exuberance!
I couldn't handle something like that. Let's say you catch an 08:00 bus, arriving Madrid around 11:00 - go to Puerta de Atocha where you have a reservation for the 12:00 AVE and arrive Cordoba at dinner time (13:30). Some of the things you want to see (& many shops) may be closed until 16:30 or 17:00. I prefer a more leisurely approach. Have you considered an overnight stop in Cordoba and a morning of sightseeing/shopping followed by a 1-hour AVE ride to Sevilla? That's how I would do it.
If you did it that way, you might continue by bus all the way to Cordoba and save yourself the expense of riding the AVE which is considerable.
But then again, I'm a 'senior citizen.'
P.D.
In mid-July this 'senior citizen' caught the 06:20 (regional) train el Puerto de Santa Maria-Sevilla, the 09:00 AVE Sevilla-Madrid, the 13:00 Continental-Auto Motorcoach Madrid-Santander, arriving Santander around 19:00. 5-days later: Santander-Barcelona (bus) and 2-days later Barcelona-Sevilla (hotel tren) followed by bus Sevilla-Huelva and another Huelva-Mazagon. So I am no stranger to the modes of travel in Spain.
[ 09-08-2001: Message edited by: Eddie ]