Considering the maximum effective File Share version is v42,949.67294 (using the maximum cpu of 2,147,483,647 as the limiting factor) and a server limit of 25 because anything past that point will take longer than 30 days to pay for itself...
9223372036854775807 = (25 servers) * (20 File Shares) * (v42949.67294/.1) * (1.5x FS efficiency) * (60hpd/hr) * (t hrs) - (1,342,177,240,000 HPD server cost)
t=(9223372036854775807+1,342,177,240,000)/19327352823
t=477218658.111hrs=19884110.7546days=~54477.015766years
*not including the menial relative cost of the server hardware required to run the File Shares or the value of AP*
Yeah, good luck with that!
By the way, the rewards for Overload attacks on primary missions should probably be scaled down like the AP cost of viruses at high levels. At the end of last round I had almost 200,000,000pvp points from blowing up 20billion HPD worth of hardware, which makes the AP cost for the above negligible.
Not to mention... "Your Gold Account has 34208 day(s) remaining."