If you use sufficiently thick paper and techniques to remove the tension in the folds, your works should last for a very long time.
I normally use Elephanthide paper (110 gsm) for my complex works. A 70 cm x 70 cm or 50 cm x 50 cm paper should give a model size of up to 30 cm in length and height. Spray the whole model with water and clip it into shape. When dry, the tension in the folds should be relieved. You can spray the model with acrylic to give it a better finish. The model should maintain its form and look for a vey long time. I live in a country with vey high humidity. There are models I folded more than 10 years ago and they still keep their shape. Another tension relieving technique you can use is blowing with a hair dryer. I have a large model 70 cm in height folded with Tetrapak paper: https://www.flickr.com/photos/chengchit/12875993723/in/dateposted-public/ The paper is laminated paper and creases quite easily. Cheng Chit
