I've thought about DIY but haven't gotten into it yet. I do have PG, VG and some flavoring, but no nic. I can see how you can save money diy-ing if you discount your time. Of course with stuff like this, our time doesn't account for much in our minds. I work leather and the time it takes to make a knife case well exceeds the $60 it would cost to buy one on-line. But being the way I am, I proceeded to get into leather and spent $1000 on tools and materials to learn how to make my $60 case! So typical!
Still, the best savings I've ever seen was on roll your own analogs. When they went to $5 a pack, I was paying $1.20, and the smokes were better. When they kept increasing in price, I still paid $1.20!
I think I'll get into DIY just for the fun of it, and if I save money (discounting my time)... Whooopiiiieee!