Viewing a Triplex tomorrow, any tips?

[Austin Keelen]

I'll be viewing my first home tomorrow, ever. My wife and I are planning on house hacking so this will also be our primary residence. 

1 building has 2 units. Both 2 bed 1 bath.

1 smaller home as a 1 bed 1 bath.

Home is a short sale.

We will be viewing the residence with the "Owner", their agent, our agent and my father who is a licensed contractor of 30+ years.

Any advice on what to look for or what to ask? Anything anyone missed and only noticed after they moved in? Thanks for the help.