return the car on the GROUND level at T1 at the Budget lot. Exit car. Agent will inspect vehicle, close file and give you your receipt. Head inside then take elevator to 5th floor or parking garage then walk across skywalk to termnal where you will arrive on level 2 with the kisoks to your right, then head to security.

total time from entering budget lot to security is 9-12 minutes depending on how fast a walker you are...

or you could check in from home and after returning the car, walk across to the AVIS lot and walk outside to the terminal then take the elevator up from the ground level... time saved 30 second elevator ride and wait...