I make my juice for about 5¢ American per ml. It's a lot cheaper. It is no harder to do than following a recipe in a cookbook, but developing the recipe will take some tweaking. THe nice thing about it is you can make you juice with exactly what you want in it; more or less flavor, more or less nic, more or less PG/VG ratio, etc. But it takes a while to get all that working together.
One good option is to buy a starter kit for ejuices. I didn't, but a lot of folks started that way. I've never tried one, but I am told people like the
Liquid Barn starter kits. At a minimum, you'll need 4 10ml plastic syringes for measuring, something to mix in and with-- coffee cup and a stainless spoon works-- and some empty juice bottles to put it in after you make it. From there, (USP Grade) PG and VG, which I usually buy on eBay; plus some nicotine juice (I get mine at
MyFreedomSmokes), and some flavors (I use
Flavor Apprentice.) An
ejuice calculator is helpful as well. Finally, reference to the
DIY section will get you started on recipes. I recommend you mix small batches at first, so you don't have to vape so much of stuff you don't like if it doesn't come out right.