Are home waxing kits worth it?

It's worth it only if you know what you're doing. I typically suggest going to a professional the first time you get waxed to experience how it should feel, especially if you're going to give yourself a bikini/brazilian wax. Sally Hansen sells a good amount of waxing kits as well as Sally Beauty Supply which has the products you're looking for (as far as wax heater, strips, etc.).