There are a lot of projects like this online and there are many ways to build one. I knew I wanted it to be portable, reusable and collapsible in a few minutes. I decided to opt for a left and right frame only, no top frame, no cross bar. Instead, I anchored each side of the left and right frame to the ground with rope and stakes. Total labor time was 1 hour.
Disclaimer: It would take me about one hour to build this again. Actual time to construct this was two weekends after figuring out what to do.
Here is how I did it.
Step 1: Sketch Your Idea
It took me a day or so to come up with an easy way to make this. After 3 or 4 ideas, I came up with this in Photoshop.