I'm a bit like you and am just now going to begin mixing my own. I've been vaping for a little over a month now.
The reason I'm interested in mixing my own is because, in the beginning, I could taste the flavors and feel the hits much better than I can now. I'm not sure if it's because my tolerance level has changed, my taste buds have been shot, or that it's become more routine and that with familiarity, the experience degrades. I'm curious if anyone else feels as if they have experienced the same???
I do believe that I need a high to very high level of nicotine (currently vaping TW 36mg but can't tell the difference between that and 24 or even 18mg variations). It seems as if I 'need' to vape all of the time and even then I have degrees of anxiety attacks at times. I have just purchased 60mg nic juice from myfreedomsmokes along with PG and VG. I plan to purchase some LorAnn flavors from Wal Mart and give it a try. I plan to start off by mixing at about a 36mg level and steadily increasing until I finally feel some sort of buzz.
Also on order (and en route) is a Silver Bullet (I figure 6v should at last give me a 'hit'), science stuff from Home Science Tools (graduated measuring glasses, eyedroppers, pipettes, funnels, etc, etc), and a bunch of flavors directly from LorAnn.
Adding all of this 'stuff' up, I'm not so sure that it will be any, if at all, cheaper to diy-it, but my motivation is not to save money but to finally get a flavor and hit value that I can taste and feel.