Should I be considering percentage of absentee owners, days on market, vacancy rates, employment information, age demographics etc?

Next advice I will give is with your age and your situation you may have a great opportunity to rent rooms in the unit you live in to friends.

Go 30 yrs at your age instead of 15.

Only go out in distance/Age of sale if you don't have enough comps.

Plus I don't want the listing to age at all.  

I'm right around your age and admire what you've accomplished.

@Rita Bautistathanks for the tip and I hope to use that information down the road. for my first purchase I'm going to use a fha, low percentage for money down, it's targeted population is my age range and most realistic I feel for my initial dive into real estate investment.

I got into real estate at a young age and owned 2 rentals by the time I was 20yrs old.

Your age you could be 30 or 80.

The vast majority of agents are horrible, especially whilst dealing with investors.