How many PDF files are we talking about here?
I ask, because I had a project exactly the same as you, and found a plug-in and server program that does it wonderfully! I've currently got 14,000+ PDF files scanned and archived in my FMPro solution using SuperContainer on my workstations and server. And it works exactly like you want to - drag and drop to add, single click to open the file after it's in FMPro.
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www.360works.com]
$195 for a license will cover up to 10 users in an organization.
Jeff