I just saw your post about emailing invitations and wanted to thank you. I was looking through the forums for ideas about emailing invitations and was starting to think I would never find anyone who supported it. Even the few people who asked questions like yours were met with "Oh don't do that, weddings are too important!" I care more about frugality and limiting waste than what people think of me, but the people on this site, even in 2015, are so judgemental about email.
Did you end up using email? How did it turn out for you?