wizardlabs is a nice cheap place to source your chemicals if you are looking to DIY your own juice. You can easily get your costs down to around 15 cents a day with DIY. All you need is the nicotine, the Vegetable Gylcerin (Walmart First Aid section - it's just called "Gylcerin" it's USP grade) around 3 bucks for say a 6 month supply, and the USP grade Propylene Glycol and your flavors. I'd go with Capella's or The Perfumer's Apprentice but Capella's is probably a safer bet. TPA is very iffy, but they are cheaper or give you more for your money at least. I think I have a satisfaction rate somewhere around 25% or less with their flavors... Double Chocolate (Clear), Peanut Butter, Black Cherry, and Grape Juice are pretty tasty.
Also, you really don't need any safety equipment unless you are a klutz. Maybe some gloves for the first time or two. Go with 60mg nicotine solution in 100% PG. That way you need less actual PG and that is the more expensive of the two chemicals between PG and VG. At 24mg strength, which is what I use, it's 2ml nic, 1ml PG, and 1.5ml VG with .5ml of flavoring. That's a 70/30 PG/VG mix with 10% flavor ratio.
Use Ejuicemeup - a free to download program that lets you set all your ratios, has recipes on board, and you can save your own or edit theirs, and you can set a default mix so that when you pop it up it will always come up with that mix. WIN.