I mean they say the cost to tear one down is 15k.

Investors (as many are greedy or have a high money cost) have a tenancy to tear down all your due diligence. 

There is job growth and houses being built all over in the suburbs as well as tear downs closer to the city.  

Should it be considered as just wear and tear or big damage.The last issue.

Plus I'm driving over 2 hours a day to and from work and the cost of gas and tolls is steep, not counting the wear-and-tear on my car.

Less wear and tear, less work in management, etc.

It's the factor worker / blue collar career that began in the 1870s and gradually morphed in the 1960s-70s into the corporate American white collar career.But some of us are weirdos and really want to sink our teeth into life and tear a hunk out of it, chew it up, and see how good it tastes.100- 400 years ago we would have been pioneers, leaving family, friends, and a known way of life behind to strike it out on a dusty trail that was fraught with peril and no guarantees. 

I lived in Palo Alto for years. and even back in the late 80's we were paying 500 to 700k for tear downs.. would build new home for maybe 300k and sell at 1.2 .. now the market is double that.. 1.5 for a tear down spend 500k building house and sell for 2.5 thats what you have here.

Compared to my yearly and seasonal properties, the wear and tear was 3x what long term is.

Not setting up and tearing down again room by room... and who wants workers coming in and out of a place they're renting?