Thanks for considering us! QR codes are part of our BudURL.Pro offering which you can register by going to: http://budurl.pro
The best way to handle the import of 5000 links is via the API which will require knowledge of a programming language. Here is documentation about the BudURL.Pro language:
http://budurl.com/page/budurlpro-api
Our Capture offering at http://capture.44doors.com has the same capabilities with its API but has the additional feature of being able to download the QR code for the shortened link. Here is a link for documentation for the Capture platform:
http://capture.44doors.com/page/api
Again to use an API does require knowledge of a programming language. We do offer guidance for importing bulk links but it will require signup with an Agency level plan within Capture. Details of the Agency plan can be found at:
http://capture.44doors.com/?register
If you want more info about the Agency plan, please let us know by replying back and I can put you in contact with appropriate representative.