2" 100 wall square tubing for 5x8 Teardrop Frame?

I have some surplus tubing I had planned to use for a storage cage. I have been told it is too light to use as a utility trailer, but I don't know if it would be sufficient for a 5x8 teardrop build.
I'm not set on using it at all, so a simple "nope" is all I need to hear from someone in the know. If it will work, I can get started today without having to go out for material! Thanks!
I'm not set on using it at all, so a simple "nope" is all I need to hear from someone in the know. If it will work, I can get started today without having to go out for material! Thanks!