I am confident you can do what you want with tiddlywiki and if you scale it up and start to hit performace issues there are plenty of tips and tricks like external images, html etc.. To build quite a large resource. Fortunaly with tiddlywiki you can benefit from website technologies yet use your own disk, and it is easy to import and export, move to a server etc... So you will be future proofed.
Not with standing the above I suggest some forthought on how you organise your information and look at multiple wikis in each major area. Knowledge and information management is quite a complex field but with the tiddlywiki platform you have more power and choices than anything else I have used.
Remember with tw files or folders another piece of information is only a html link or drag and drop away. I have wikis that link to wikis and bundles of tiddlers for tools I want in more than one tiddler. Being organised is a good start but not essential.
Sure tiddlywiki is an investment in time but it continues to return more all the time to me, and the community is great.
I have being using the classic and tw5 versions for almost 10 years and just build what I need when I need it.
Regards
Tony
I know no other way to say this but directly. I explained its not your fault you have taken a wrong path, but you have.
My offer still stands to help you with a screen share if you give me control or I do a presentation for you.
Regards
Tony