Be very aware of your surroundings, definitely setup a way for your renters to submit payment to where you don't have to physically collect.  

You have two choices, hire someone who is willing to teach you how to estimate (online or physical), or self-teach by buying some books like J Scott's book or Construction installation encyclopedia.

First of all, there is physical appearance and second there is how you act towards people.

the deposit is for damages, financial or physical, which are ultimately the same.  

I have many physical issues.

You can't always base your analysis at what the MLS data shows for rent but physically go look at it and see what you can do to increase rent to make the numbers look good.

We use to physically collect the rent every month.

I'm curious about where you got the advice to "look at" 100 properties because, maybe in the context, it doesn't mean to physically look at.

The problem is that because real estate is a physical and tangible asset, people treat it differently than other asset classes.

I try to do business only with people that I can physically look eyeball to eyeball with.