Once Hipster accepted he had three accounts to report (personal, company, joint), the mechanics were less dramatic than getting there. The FBAR isn't attached to a tax return and isn't filed through IRS e-file. It goes straight to FinCEN through the BSA E-Filing System, a free government portal. He can file it himself, or a paid preparer can, with a signed Form 114a on record.
For each account, the form asks for the institution's name and address, the account number, the account type, and the maximum value during the year, plus extra owner details for joint and signature-authority-only accounts. Pulling statements for all three accounts took longer than the filing.
The deadline is April 15 of the following year, the same as the 1040, thanks to the Surface Transportation and Veterans Health Care Choice Improvement Act of 2015 (Pub. L. 114-41, § 2006(b)(11)). And the extension is a freebie: FinCEN grants an automatic extension to October 15 to anyone who misses April 15. No form, no letter, no reason. File by October 15 and you're not late.
One filing doesn't cover everything. The FBAR reports accounts and their values. It doesn't report the income those accounts earned (that belongs on the 1040), and it doesn't cover his ownership of a foreign company, which can trigger its own information return. Those questions belong to other chapters and other books.