Yes, it is very cost effective to DIY.
Aside from less expense it was required that I do it in the beginning as I had a sensitivity to something in the juices I had. I needed to pinpoint the problem ingredient. Vaped straight VG first for a day then straight PG the next day, no flavours or nic. For me it was VG that was causing me grief.
Once I eliminated VG from my juices I could continue to vape and smoked less.
Without being aware of DIY and experimenting early on I may still be vaping and not smoking but for sure would be living with the puffer in my yap a Lot more. YMMV. Cheers.
that's interesting that you had a reaction to VG that's the first I've heard of it. thanks for the heads up. I plan on DIY in the near future just gotta make sure it doesn't make the wife sick. she smokes cigarettes and the smoke from that doesn't bother her but if she walks into bath and body Works and it's headache city.