First, this isn't about the weight of the stuff. I'm well aware that the 70D is twice as heavy as 30D silnylon.

But does it also pack twice as big? Is there any other glaring reason as to why someone who is very budget conscious should spend the extra money on silnylon over 70D urethane coated nylon when making a DIY tarp? More specifically, the winter tarp as laid out on

Time is is something I can easily free up more of.

Money...not so much.

Well, not if I want to keep my better half happy!