What happens if a tenant causes significant damage?

This will cause population growth as people look for affordable places to live.What lesser-known markets are you currently researching, and what specific metrics are you using to evaluate their potential?

Also, take as many pictures as possible before the tenant moves in, again this protects you in case of damage caused by tenant. 

Too many payments can cause a paperwork nightmare.

The only way you're going to know about the cause one way or the other is to have a plumber inspect and troubleshoot.

The property has had about 2" to 2.5" of downward settlement on one side of the house, which has caused drywall cracks and uneven floors. 

At the very least, I would request a refund of the original application fee as the City made a mistake causing you to have to submit again.  

Otherwise, you won't have the extra funds necessary to cover the rising costs of goods and services in the future.What causes rents (and prices) to increase?

What red flags would cause them to pass on a deal? 

So you don’t end up being the cause of frozen pipes.