As long as the shingles are unbroken, the asbestos will not deteroriate and become a health hazard. 

If a big wind blows your shingles off the insurance pays for it.

I have had tools, vanities, 20sq of shingles all at the same time.

If the roof needs replacing always opt for the lifetime architectural shingles with streak guard.  

Same could be said for the solar panel shingles.

As an agent, I could be using my own Sentrilock computerized lockboxes, but using the Codebox means I don't even need to pull up and send one day codes, Showmojo automates that.

Well the original roofer sent out a helper who just kept plugging the hole (I think he came out 3 times) and it kept on leaking because it was a low pitch roof that needed a membrane and not shingles.

I can remember crawling around on the roof of our house pulling loose shingles off when I was 12. 

If you're a roofer, a Lumper- all you do is carry stacks of shingles and tear off, you can make $50,000 per year.  

Plenty of tenants don't care if shingles are missing, or if the caulk has dried up, or the kitchen sink has a slow drip at the P trap.