You need to compare apple to apple in terms of job growth/demographics/population stats/neighborhoods etc for both cities before narrowing down your choice of place to invest.

Looks like you have some great feedback, but the one thing I'll add is regarding your unit mix. 1 BRs invariably turn over much more than larger units, due to the mobility of the tenant demographic, and is a good thing to keep in mind.The other factor that is healthy to consider is your exit strategy.

There's a lot of markets where you can find that but many of them have week economic and demographic trends.

I rent my single families 3bd, 2ba) for $1,500 but this may or may not be your case depending on your demographics.

I was wondering the best way to find the area demographic. specifically population how many land owners and how many renters there are. just trying to find how much demand there is in this area.

In San Antonio there are many pockets of areas and neighborhoods that are close in proximity but are demographically different and can vary in value white a bit.  

I tend to believe it’s based on location, demographics, rent costs, and appreciation of area.

South TucsonNot a lot of options in Oro Valley, Rita Ranch, Cat Foot and other otherwise desirable parts of town.You can also further segment based on price point, tenant demographic, whether you want to accept students/Section 8, proximity to hospitals and grocery stores, etc.Hope that helps a Tucson buy-and-hold investor out there somewhere :-)

The school and demographic mapping trulia provides can be helpful too. 

You have to analyse demographics in EVERY city.