I know I felt intimidated before buying the RM2, and I would bet that most felt the same way. Truth is, it's super easy and pretty fun. It might take you 5-10 minutes to build your first one, then you'll be knocking them out in like 2-3 minutes. You can even leave the coil in place and just replace the wick (slide old one out, slide new one in (don't tell the wife)), and it's almost like a brand new atomizer... that cost you literally less than a penny.
The vape between a grand and a RM2 is unbeatable, and in my opinion, the most convenient and hassle free! No leaks and misfires, it just works. If there is any kind of problem you can muster up, you will get answers - quick! Very good support group here, we're all running the same thing!
I like the Grand because I can dunk it in water to wash it, and it can take a brutal beating. I don't drop mine much at all, but when I do, I usually do a pretty good job of slamming it on the ground really hard. I'm more worried about my toes being in the way than the Grand breaking. The VV is a little more fragile, no water bath for that guy! By making your own coils, you are making your own VV... it just won't be regulated... but that's nothing an extra battery won't fix halfway through your day.