First Time Buyer - Triplex

[Kelly McIntyre]

Hi I'm looking to invest in my first real estate property EVER in Wilmington, NC. I'm 25 years old and looking for some help/advice on a potential investment. 

The property I am looking to purchase:

Asking price $275,000

4 BR 2 Bath & detached efficiency unit attached to the garage 1 BR 1 Bath

1,950 sq ft

Built in 1947

The whole property currently rents for $2,475 ($950/$900/$625) and the current vacancy rate is 7.71% in Wilmington. The property is in decent condition - not great but no immediate updates needed. All units are currently rented. My dad will be helping me with this investment and paying for the property in full in cash. He will own the property but I will be paying him the mortgage (3.5% rate, $20,000 down). Does that make sense? 

ANY help would be awesome, what am I missing? What should I offer? Is this a good deal?

Also if anyone knows of any real estate agents that works regularly with investors in the Wilmington, I'd love to get their contact information. 

Thanks in advance!