Have you given a thought to Tableau Reader, its free and requires no access to the Server? Although, its not a sophisticated solution you may give it a try.
On what ways you want to export tableau, I didn't understand your requirements much in details.
As per my understanding, you need to report to send out to 60 Users right..?
Create a Guest User and Assign all users to Guest, so that, users can able to view report. (This is best way)
Without Tableau server, If users have tableau public installed in the users machine and you cans send .twbx file to open.(this is not correct)
Please let me knoe if you have any questions.
The user came with a requirement that the reports developed through tableau should be sent to each of 60 users in the form of export.
Most likely they want the export to be in the form of pdf.
Is there a way we can achieve that?