Is QuickBooks the right program for this application?

Hi all -
I am working with a start-up venture that will have multiple vendors and has an automated front end that will generate payables.
I presume I can figure out how to import them into QB without too much
I'd like to use QB for accounting and check writing (probably eventual EFT) etc because I'm comfortable with its quirks, but will I outgrow it in an application that could end up with 5,000+ vendors?
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