Curious, what's the cost of an initial setup? I've been thinking about doing this as well. Is getting a starter kit the way to go? I'd like to start small. How do you like it so far?
I started with a 120 ml bottle of 48 MG/ML nicotine in 50/50 VG/PG base, 120 ml of VG, 120 ml of PG, half a dozen flavors I thought I could work with, a blunt 3 ml syringe, a bunch of 15 ml bottles from juices I had used up and the mixing calculator, 'eJuice Me Up'. Cost me around $60 I think. You can spend a lot more to start out, but until you know if this is for you I agree starting small is the way to go.
For sure read the DIY forum here and ask questions if there is anything you are unsure of. Remember also, what you put in your juice is going to be inhaled and some of it will end up in your bloodstream. Never put anything in there you're not sure is safe.
I've been doing this for over a year and love it.