Welcome to the wacky world of building your own guitar. My first was also a 12 fret 000. Mine happened to be from Steve Kovacik, but John can furnish pretty much the same pieces. The other source that I have used several times is LMI, their kit wizard is really fun (and can get expensive LOL)
Here is a very brief build thread from the old forum
http://www.kitguitarsforum.com/archives ... 25_0_6_0_C
and kind of a tongue in check one about my basic shop
http://www.kitguitarsforum.com/archives ... 46_0_5_0_C
Since that day I have built a few more, and maybe have a different perspective on tools, so lets go there first. Power tools that I would choose in order are a cordless drill motor, a good laminate router (I show a full sized router in my thread, a smaller one is better). I use a band saw a lot to make molds and fixtures (not much for kits but when you get to a scratch build you'll need one). You can get by with a saber saw for molds or even buy them premade (I make mine out of MDF). A drill press is handy but not necessary (I use them to press in frets believe it or not). A belt sander is really nice. I have a table saw and hardly ever use it, and when I want pieces thicknessed (again, not necessary with most kits) I just go to a local cabinet shop. If you are going to try inlay you'll want a good Dremel with a router base.
Thats the power tools. Lutherie and special tools that you can't live without - fret file, nut files, tapered reamer, binding channel routing bits (several options, I like the stepped StewMac ones). Flush cut router bits, bits for your Dremel. I didn't use a go-bar deck on my first ones, use it all the time now. Likewise a radius dish, you can work around it but they are sure nice. As I build more I've added a fretting caul, special nut measuring rule, a fretboard radius sanding block, setup tools - but again, you can work around. Recently I added a buffing wheel, it makes burning thru your finish much faster.
OK, a couple more comments. 1-3/4 is the standard nut width for OM and many 000, if you really need 1-7/8 you might be into a custom neck (and probably an extra wide spaced saddle). You would be much better off to stick with industry standards. I've built both dovetails and bolt on necks - dovetails are elegant but much more work and frequently give new builders problems.
Finishing is one of the things that also gives home builders fits, but it really isn't that hard. As you know, 90 percent is the prep, the rest is many coats of your product of choice and lots of sanding/buffing. The finish stages of my builds takes longer than assembly - figure 4 to 6 weeks minimum. I used rattle cans of nitro on my first ones (toxic, dangerous, stinky, but lovely finish) and have switched to water born finishes lately. My finishes aren't perfect but they are pretty darn good.
Final comment, I built my Kovacik 000 about 6 years ago, followed shortly by a John Hall OM 12 string. They are may daily players - my two very nice Martins just sit in the closet. Since then I've built a total of seven and have one on the bench and two more in the que. Just a warning.....