You'll have made a total of 130BTC sometime early 2016.. and by then that 82GH will only be bringing in something around 50 satoshis a day.
I would have taken 130BTC.
On paper, that's how it is. But on paper he should have gotten his avalons 2 months ago. On the other hand, on paper, if there's one thing you should pay attention to and consider (IMHO) is this:
Future Proof
The Avalons components can be upgraded and swapped out as future parts are released, like a normal PC. You are not forced to switch entire systems.This reads on their web page. I think that's really on black and white there. Maybe you don't need to get the ROI, maybe you get some BTC for upgrade modules that will get you your ROI. Who knows, but that's what's on paper.
But things rarely go like it stands on paper. It works both ways.