Welcome! If you look on the home page of this site, you'll find a bunch of MYOG articles and links to more.
While looking up something else a few minutes ago, I came on this interesting idea from Will Reitveld for an inexpensive MYOG shelter, bivy: Tyvek tarp and bivy
He also has an article Make a hooded rain jacket and chaps under $10.
I haven't tried any of this, but Will has a really high reputation in ultralight and lightweight backpacking circles. At least the material is inexpensive enough that you can both use it for practice and actually try it in the field!
Edited by OregonMouse (04/04/16 06:27 PM)
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey