Anyone here purchase one unit in an apartment?

[James Cho]

I have been looking at properties and I guess since it'd be my first one, I'm a bit bedazzled. I have a few questions as most of my real estate investing books have been in regards to apartment complexes or SFH's not single units within a complex. What are some general things that one must consider when looking into the expenses of an apartment UNIT vs a house? What are the pros and cons of owning a single unit as opposed to a SFH?

Since I am in NJ, I find the types of places I'd like to own properties are prohibitively expensive as a new comer. But I ran some numbers and then compared with the market rent with rentOmeter, and current listings of similar properties on market... and as far as I can tell.. it's a go numberwise. Thus putting this out there to see if there is anything I am missing! 

Thanks! :)