I personally find that the kits are just to high priced for what you get. The supplies needed are very minimal. Here is basically all I need.
Nic -
https://www.myfreedomsmokes.com/nicotine-base-flavorings/nicotine-solutions/unflavored-nicotine-smoke-juice-e-liquid-9395.html This is a fantastic price on nic.
PG and VG -
http://www.essentialdepot.com/servlet/the-218/1-Gallon-Veg-Glycerin/Detail When you consider the quanity, it just seems more economical to me.
Graduated Cylinder -
Graduated Cylinder Bomex Glass - 100ml
Pipettes are nice to have but I rarely use anymore. I picked up some syringes at my local Sam's Club Pharmacy for like $.23 a piece. (as you can tell, I'm frugal)
I have tried many flavorings and come to just use the gourmet and super concentrated flavorings at
DIY Flavoring / DIY E Liquid Concentrated Flavors at VZ - E Cig eGo, E juice, Mods, Cartomizers, Liquid Nicotine, DIY Flavorings You use such a small amount that I feel like it is saving me even more and I have been so pleased with everyone I have tried.
Just trying to help, didn't mean to bombard you with so much. Good luck to you and remember there are so many wonderful DIY threads and there are always people around here that want to help. The main thing is just to have fun.