A video (3:41 miin.) showing the construction process for a basic, but very comfortable woodland shelter.
1) You need tools and skills (hammer, tree saw, nails, plastic sheets). It could be built without these, but you really need to know what you're doing.
2) You NEED lots of small diameter trees (2 - 6 inch diameter)
3) It will take a couple of days to build, minimum.
https://www.youtube.com/watch?v=rdPR_hOt2msDO WATCH ALL THE WAY TO THE END
I would hire the builder based on this video alone. Skills are important.
Then watch part 2:
https://www.youtube.com/watch?v=Xk_hdwpqE_k