I started with the following smaller quantities of VG, PG, & Nic Base in VG...to see if I really even liked DIY first. I knew I wanted to do multi-flavoring eliquids though, so I spent more on them than you'd need to...for making single flavor liquids. Still, everything cost me about $55 total.
(1) 177mL bottle of VG - Walmart
(1) 120mL bottle of PG - Wizard Labs
(1) 120mL bottle of 24mg Nic Base in VG - Wizard Labs
(25) 8mL vials of TFA flavorings - Wizard Labs
(6) Syringes - 1mL, 3mL, & 5mL - Wizard Labs
(6) Luer Lock Blunt needles - 14g, 16g & 18g - Wizard Labs
(2) Pair of nitrile gloves - Wizard Labs
Already had about a dozen clean, empty, 10mL, 15mL, and 50mL dropper bottles. Also had some graduated cylinders and some beakers, but I hardly ever even use them, since I usually always make my mix directly into the dropper bottle.
If you knock off the 25 vials of flavorings and instead...get several of the single flavorings from OSDIY Shop...you should be set with enough stuff to at least get you going in DIY for less than about $40. If you end up doing what I've done since starting and liking it...I buy my PG and VG by the gallon from Bulk Apothecary now, and buy 100mg/mL Nic Base in VG by the 500mL or 1L bottles.