Kits are generally overpriced, low quality, and include extra "filler" items that serve no real purpose except to jack up the price. You're probably better off deciding what you need, purchase good high-quality items individually, and assembling the "kit" yourself.
For juice-making, you will need:
PG and/or VG
Nicotine (optional, but probably)
Flavor concentrates (optional, unflavored can be pretty good too)
Measuring equipment - either:
- graduated syringes and blunt-tipped fill needles, or
- a .01g digital scale and disposable pipettes
Mixing vessels (little cups/beakers/etc. - optional, or you can just make your mix right in the bottles)
Dropper bottles (optional, or you can just wash and re-use the bottles from liquids you already have)
For rebuilding:
A digital multi-meter or 510 ohm-reader (NOT optional unless you use a regulated mod with ohm-reader built in)
Your preferred gauge of Kanthal or Nichrome wire (suggest 28 and/or 30-gauge to start with)
Something small and round to wrap the coils with (small screwdriver, drill bit, toothpick, etc., or dedicated coil jig/gizmo/winding tool)
Tiny flat and Phillips-head screwdrivers
Precision screwdriver set (optional - can potentially replace tiny screwdrivers AND coil-wrapping tool)
Wicking material (organic cotton balls, Japanese cotton, cotton yarn, rayon, silica rope, or stainless steel mesh)
Scissors (to cut wicks - maybe optional, depending on what kind of wicking material you decide on)
Nail clippers, snips, or diagonal cutters (maybe optional, if your scissors are tough enough to cut the wire)
Tweezers (optional - for replacing/adjusting wicks, or help pulling out old coils)
Ceramic tweezers (optional - for adjusting/compressing coils while firing)
Regular/needle-nose pliers (optional)
Magnet (optional - for gathering up little bits of Kanthal so they don't end up in the carpet and eventually in your bare feet)
Variable-speed cordless drill (very optional, only for twisted/advanced wire configurations)
...those are pretty much all of the basics, and some of the extras you may or may not require. Get you some of those, and maybe a little plastic case from the crafting or hardware aisles to keep them in, and save yourself the headache of a pre-assembled kit.