Ok, here's the top-down. Please disregard the furniture in the image as it doesn't match my home (it's the image from the ad they used to sell the apartments). The only cabinets that would interfere with the installation are the ones in the pictures.
Here's a 360 picture of the room: http://sphereshare.net/#!/s/b86b61796aab1289c3e1b26e64c34f88
(link doesn't seem to be working now but hopefully it'll work soon)
The red line in the top-down is about where I'd place the screen (it'd go closer to the wall, my mistake). It measures 165 inches, but there is a tall cabinet on the side that reduces the area that can be used for the screen to about 120 inches wide.
The ceiling is 8 feet high.
The distance to the wall opposite to the screen I'm not able to measure accurately, but it's very very far. I'm sure I don't need to go that far.
The height of the lower cabinets is 26 inches so that leaves me with about 70 inches to work with. That's almost a perfect 16:9 with the 120 I have in width. I don't know who planned these cabinets but this seems to be working to my advantage =).
Are there any important measurements I'm missing?
Also, how much space should I leave between the screen and the side walls / ceiling / lower cabinet? i.e., 120x68 = 138" but I'm sure it'd look horrible to fill the entire area with the screen. I'd need some kind of border. How much is usual? I was thinking 110" but I wanted to know what's the "limit" if there is one.
Thanks for all the help guys!