Yeah well NorCal is literally ON FIRE.. the air is so smokey, But, that would be off topic. 

I'm 10 miles in the air looking at your situation, so take it with a grain of salt.

Current furnace was installed in 1987 (very old) and it’s forced air furnace (no radiators)Any recommendation on what I should do?

Macbook AIr is awesome for the price.

Or, they will develop a box that just sits there and blasts out cold air into a house which will reduce the summer heat to a much more livable temperature.

I'm 25 years old and on my first assignment with the Air Force in Tacoma, WA.

It depends what the math says keep in mind that on air bnb you will have significantly higher management costs and you will have cleaning costs that would not be present in a traditional rental.

The map suggests that there are no issues with the location either (train tracks, air strips, busy roads, etc).Conventional wisdom says that leaves three possibilities:1.

I've even thought about getting a SF and possibly air bnbing the rooms out as well. 

Two of my vents arent getting air pushed through them from the AC unit (7 other vents are working fine and receiving air and the AC system works fine).