Depends on how big the fund is, how many transactions, how well you keep your books, and which accountant does your work!
SMSF audit is treated pretty much as a rubber stamp at a lot of places, to the point of even having undergraduates with no experience do the full audit.
Your accounts shouldnt be that much if you dont day trade in your super fund!
If you keep your books clean, provide full bank statements with every transaction narrated, and div statements, annual tax statements & buy/sell contracts all together nicely it shouldnt take more than a couple of hours for them to knock up your accounts, and maybe another couple if they do the audit in-house