I strongly recommend you define a tenant scoring system and stick to it.

So, a lot of people have been advising me to "learn my market", which is something I definitely need to work on more, but that statement seems SO broad and so I have no idea where to start.

3) What is the metro market size as defined by Bestplaces?

Your question is very broad. 

An exchangor is a principal or agent that improves  a client's or personal situation by exchanging current property ownership benefits for an improved set of benefits, as defined by them, to be realized from the process.  

Good question (but broad). 

Could you define close to the city vs outskirts? 

I'm a fan of Bigger pockets, so I figured I would post a broad question like this and say hello to everyone. :-)

I'd suggest defining some cities that you would want to live in, first. 

You define your costs, build in some overhead, and that's your fee.That's a very simplified explanation.