Or simply walk left of the counter pass dunkin donut stand and through the entrance towards cars. On the left is a secondary Avis/Budget counter. Usually not too busy, but now you know.
Did you call the 800 number for budget? Maybe the can advise on what is happening
Take the silver line from the airport, it's free.
take an uber, Lyft, or try one of the other 15 companies that rent cars right next to them. You can literally book while standing in line, I've done it before.
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