The hardest part for me was sledging out the cinder brick wall. I would recommend buying 2 a/c units just in case it otherwise its been a great experience, I even keep some beverages for myself in there.
Discussion
I will become the neighborhood liquor store if I do that lol
If you has to choose between a 2nd ac unit or a backup generator, what would you chose
If your on the property go with the generator as it will benefit you if power goes out. The generator takes more time to put in place. While not fun if your running to walmart or the hardware store you can swap the ac unit in no time