Older dupex as Owner-Occupied STR

[Adam Johnson]

Hello all!

First post and first investment so please go easy on me! haha

I'm 23 and looking at an older home in Nashville that is an older (1945) duplex. My plan is to live in one unit and use the other unit as an STR. The home has some older wiring and came back with a lot a things on the inspection such as small cracks in the block and stone at the foundation.

I'm buying this as both a primary residence and a STR so I don't want to end up in something that I'm way in over my head and end up having to dump a ton of money into. 
Should these things be a concern for being allowed to STR this property or could I be over reacting to these matters?