To get an initial feel for a market I recommend looking at:Population growthAverage Income growthProperty value growthRatio of property owners to rentersDemographicsLarge economic drivers (Hospitals, Army bases, Universities, other large employers)Street view on Google mapsYou can find all of this information with a Google search. 

Anyway - those the forces that create the housing shortage and what drive rent rates up here locally!

I'm a commercial driver so the commute is not a concern for me I'm used to it but lender has concerns about it and will not process the loan until I transfer.

Determined by drivers like job supply and renter demographics. 

That way we can get the info like drivers license numbers and license plate numbers etc.Thanks in advance!

Anyways I was thinking of becoming a truck driver after I get my associates degree and using that income to qualify so that I can finally buy a fourplex and do some house hacking.

Would you rent a unit to a truck driver with 3x rent income but has a collection and missed some payment for his student loan and is going through a divorce?

You are the one in the drivers seat in this situation, you are deciding if you are going to let the prospect live in YOUR house...most likely the person on the other side of the phone is going to be worrying about what stupid things they said! 

Sometimes this is a very strong driver. 

No consistency.So the big question is... what is the big driver behind rent fluctuations?