I looked into using them for construction as I am building a office / workshop, roughly the size of two 20ft shipping containers. As much as it may be glamourised on social media, it has a lot of limitations.
In my case it's actually cheaper and much more flexible to build it as you would a traditional building. I live 300 miles from the nearest port, so that doesn't help. I also looked into the container sized temporary buildings used on construction site, and they are made from scratch (not from old shipping containers).