You MAY someday be able to refinance this for a lower rate, but if the success of the investment depends on that it is akin to the blackjack table.2.

But, the poker player is thinking that a 70% chance of winning is damn good (especially over the long-run), and they don't consider it gambling.Then there are people who are willing to take that further...They say, "I'm a good blackjack card counter. 

Why didn't you find a "full time" job in those 11 years rather than stay on as a temp at a place you hate and don't say the economy or some other excuse.  

Nothing has made me more money in biz or investing than understanding the game of blackjack. 

If you haven't talked to @William Allen and the folks at Blackjack Real Estate, I'd highly recommend doing so.

The incoming temp at it's coldest was 45 degrees.

That way they can't say they couldn't keep the temp at 60 for 2 weeks.

Yeah, you can argue a good card counter has an edge in blackjack, but otherwise, gambling is driven by randomness, not knowledge, research, collaboration, etc.

Using a thermometer, measure the air temp at the return (where the air enters the evaporator/blower unit) and also at the register (select one close to the evaporator).

Make a few bucks on a hand of blackjack.