I hired out the drywall, so that phase only took a couple weeks. Realistically, it would have taken me 2-3 months if I tried to do it on my own.
Next, I moved on to painting. Painting also went really fast. It took 24 hours or so do it all. Instead of hand painting, I used a paint sprayer. In the end, it's a much faster and better process. It was quite an adventure figuring out how to use the machine.
I ended up listening to Devo while wearing this outfit. I highly recommend doing this at some point in your life.
Here's a quick video that shows what the basement looks like now.