What to look for/ask when walking through rental property?

[Mitchell Cochell]

I'm a new investor looking for small multi-family rentals. I'm walking through a duplex next week that looks promising and I want to know what I should be looking for/asking the agent & owner. I know the big things to ask such as roof, HWT, windows, ac, etc but I'm wondering if anyone has some advice on other things to look for that could end up causing problems down the road. Any help would be appreciated!