Hey Julie, congrats. Sounds like a decent deal. I just ran the numbers through my handy dandy spreadsheet and even if you did purchase at 180k, with rent at 2400/month, total CoC is still in the high teens. I like to use worst case scenario numbers. If they work, then the deal can only get better from there. I put insurance at 2200, though you'll want to shop. I use USAA. They're a little more pricey than others but their customer service is phenomenal. You mentioned the current owner is military. If he purchased it with a VA loan you may be able to assume it, if you have any ties to the military.
I would add the cost of initial repairs to your total cash assumption up front. Also, start advertising the vacant apartments the day you close. Your accountant will tell you why.
The out of pocket cost is always a downer when you go the traditional finance route. I did that with my SFH. Now my goal is to get creative. Keep us posted on the progress.