Originally Posted by
kxc262
If the location is the same, pick up dates just need to be on different days. You can return at 11:59pm and start the new contract at 12:01am and will earn credit.
You can also do one contract SAV-DAB, then DAB-SAV. If you really wanted to, you could also do continuous roundtrips alternating between National and Enterprise at the same airport location. If it's a small airport and you reserve/drive the same class, Enterprise might let you keep it, especially if the agent working the counter for National/Enterprise/Alamo is the same.