Paint sprayer or power roller for painting an entire condo?

[Rene Hosman]

I just went under contract this weekend for what will be my first BRRRR, and I'm as excited as I am nervous. The place is a mess but I'm excited to see what it becomes. It's a 2 bed 1 bath ~900 sq/ft condo and the entire thing is painted black & dark blue right now.

I have two other rentals in the area and I use Alabaster by Sherwin-Williams for all my rentals to make paint touch ups easy, so I plan to paint this one the same. I'm going to need a great coat of primer, and then I'll paint the walls with Alabaster. 

Since I have to do the entire place, and it's unfurnished I figured this would be the perfect time to paint and then do touch ups later. I'm a very DIY investor and I want to invest in a good painting set up. What would you recommend a good paint sprayer, or a power roller to do all the walls in this 900 sq ft place? If you recommend one over the other do you have brands or types you recommend? Thank you!

Photos of the place as is: