Here are my thoughts, since you asked.
First off, take one step at a time. You've got a 30W and an 80W mod already, so you really don't need a mech mod as well. Furthermore using the variable mods will give you more options on the types of coil builds that you can use and make work. My recommendation would be to concentrate on the rebuildable tanks and dripping atomizers before getting a mech mod. It's easier to learn to use one at a time.
So, that would save you the cost of the Stingray, batteries, and charger, which is a good thing because you need more stuff for your rebuildable tank(s).
If you're going to get into rebuildable tanks you need some basic tools. This is a good place to start:
1. Small pair of wire cutters
2. Tiny philips head and flat head screwdrivers
3. Ohm meter
4. Pair of very sharp scissors for cutting wicking material
5. Basic set of small diameter drill bits or something similar to wrap your coils around. There are jigs made specifically for wrapping coils and they are a good investment to make.
6. Small butane torch. (Optional, but makes working with some wire easier to work with if you torch it before wrapping your coil)
Silica wick works just fine, but most people prefer the flavor of a cotton wick. Specifically Japanese Koh Gen Do cotton works great for wicking material.
I would suggest buying .26, .28, and maybe even .30 gauge kanthal to start with. You'll find that it's not always a one-size-fits-all wire. Some coil types work better with thicker wire, some with thinner wire. If you're shooting for a specific ohm coil you may find one gauge requires too many wraps while another takes too long to heat up. .28 is by far the most popular gauge to work with, but having the option of moving up and down in gauge to meet your needs is always nice.
The Fogger V4 is a good tank but it can be a bit tricky to work with at first. You may want to consider the eleaf Lemo to start with. It's more newbie friendly.
I would also suggest that at some point you pick up a basic single coil rebuildable dripping atomizer. Nothing fancy or expensive at first. The reason for this is that when you're learning how to build and wick coils it's always easier on an RDA. That way you don't have to worry about the entire tank of juice or go through the trouble of siphoning out your juice and tearing down and cleaning your entire tank if a coil build doesn't work as you had hoped. You can try new coil builds and wicking methods on the RDA first and when you're confident that you got what you want you can replicate the build for your tank.
You want something easy to learn and test on, and something that's easy to take apart and change before you risk an entire tank of juice on it.
Then, once your comfortable and confident with the rebuillding systems, if you're still interested then take the plunge into the mech mods. There's a LOT to learn about mech mods before you dive into them. Battery safety above all. Know your ohms law calculations and safety measures that need to be taken. It's a lot to take in, which is why I suggest learning the rebuilables first and mech mods later.
