DIY is the way to go (see signature below for my monthly vape cost)
Read all of the stickings in the DIY subforum regarding safe handling etc (100mg can cause serious damage if mishandled)
RTS vapes for nic, flavors, syringes for measuring, empty bottles (some 30ml plastic for everyday use, 5ml for experiments with flavors, vg/pg percentages, 120ml for making larger batch of favorite flavor)
Amazon for pg and vg and/or syringes (get a large catheter tip for your vg, pg will go through a 14ga)
a juice calc program - (my preferred excel based program is this one)
http://www.e-cigarette-forum.com/fo...e-calculator-added-quantity-calculations.html
a notebook to keep track of mixes (I made a great tasting one when I first started, can't remember percentages of different flavors to repeat it - DOH - so I just added a page to above program to copy all important info to an easily printable page - I'm old and like to print things (large print))
just my 2 cents