Google Forms and SurveyMonkey are a couple good 3rd party apps that do this better at scale.
Since you're doing it in Marketo, creating a custom smartlist view that includes the fields in your survey and exporting the results to Excel is probably your best bet as Josh said.
So I'd very much caution against requesting SSN and/or credit card data in Marketo unless you've setup SSL and are taking other security precautions. I had a client accidentally sync SSN field to Marketo - VERY BAD risk.
If you are sending this to 3 people, perhaps it would be better to call them up instead.