/cgl/ - Cosplay & EGL

If I want to make a bag like pic related, should I use faux leather, cow hide, or soft leather sheepskin? I try to be conscious of animals when I purchase products and never buy leather items new, and if I purchased real leather would go to a local tanner/person who deals in secondhand animal skins and furs.

I'm mostly concerned about whether or not soft leather would be too thin as some larger sheets have natural holes and thin spots. But I have a Janome at home machine and don't know if I could even get much done with a very thick leather.