I suspect this is a mishearing/transcription as it doesn't make sense with 'walking'. It makes a lot of sense with 'working' though. They worked during the spring break (holiday from college/school) and saved up the money for a trip.
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Nona The BritIt's very helpful. Thank you very much.
How are you coming/getting along? = How are you doing/progressing? 'How successful have you been at saving money for the trip?' in this context.
'I'm still a ways off' - I'm a long way from what I need/'I don't have enough money' in this context.
How are you coming along? /"How's it coming along?"
They're awfully useful!
what will the formal answer of how have you been coming along?