I don't know that I'd recommend a kit. If you stay with it you'll end up upgrading most of the tools and the materials are junk. And I don't tie to save money. I'm not sure that's possible unless you are a full blown production tyer.
I tie because I like to experiment, fish/hunt with things I've made, don't have a fly shop nearby, and so I can customize the size/color/action of the flies.
The most important tool for tying, in my opinion, is the vise. I recently got a Mayfly rotary vise. They are only available on eBay and are assembled in the US just across the river in AR. There's nothing more frustrating than a hook turning loose from the vise right after you've wrapped and trimmed a hackle. Once I got my jaw tension set, it's been rock solid. This vise runs less than $100. You won't find anything with near the features it has for anywhere close to that.
Otherwise, I'm using entry level tools. I whip finish with my fingers and the bodkin. I use clear fingernail polish for head cement. I pretty much stick with 210 denier thread for all my tying too. I don't tie down past a size 12 hook and hate breaking thread. I can tie bluegill nymphs and spin deer hair bugs with the same spool.
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