In looking for a manger I see that there is a wide range of maximum repair value that the management can authorize without my authorization.

It is going to be tough for you to find a high LTV conventional loan through a bank or credit union with a property in that price range.

I think I could 1031 each of the duplexes into a newer 2000s later build SFH in the 185-200k range and mitigate a lot of the vacancy/capex issues I’ve been having w the older duplex units.

My listed rents are in the average range for the market they are in. 

Currently a Junior College student , wanted to buy my first investment property either my senior year of college using a business credit or possibly getting some type of Loan for the property, can anyone lead me in right direction was looking for maybe one in the 60-80k range with possibly section renting it from me as passive income.

The pre-approval will last a year so the sooner you do it, the sooner you will know what price range to look at.

I'm targeting NPN notes on houses around the 50-80k FMV range.

Once I enter the data Zillow spits out a price range for the properties shown and a map with all of the active and inactive properties in the area.

Do you have price range in mind?  

If the rental market is still strong, what kind of price range seems to rent well for an SFH?