Sorry, it's a 20 year deal, not 10. So that's $150 mil a year (it is believed to be worth $3billion. I bet incentives are part of it to get that high, though). I goofed, thought it was 10 years.
Your examples are proving my point.
As for the $5mil to $10 mil, it's about opportunity cost. Why spent so much money and resources to get a 2% return when you can get a 7% return elsewhere, etc.
Again, last year the owners and Stern claimed massive losses, bigger than this year's claims. When the calculations went through, the league made more money than the previous season. I don't know how it is in Australia or anywhere else, but in America you can do a lot of shady things to make a profit seem like a loss.
Furthermore, Washington Wizards were sold for $500 million and Nets for $200 million. There is no way these franchises would be bought for this much if they were hemorrhaging money. For comparison's sake, look at how Newsweek was sold. New Orleans, however, is truly losing money which is why no one wanted it. Stern has claimed that right now 10-15 teams are losing money, yet only 2 teams are up for sale!
When it comes to actual profit making, asset prices mean more than accounting.