I read your post and I happily remeber my own exprience 2 years ago. i didn't have any experience in instrument building but I decided to make a lute. I didn't have any original plans but I reconstructed measurements from pictures and descriptions which you can find on the Internet. The whole summer I enjoyed in making mould, body, neck and pegbox. That was a really nice experience but I stopped on the soundboard and pegs because I had problems in finding material and money. I succeeded in making a nice body but I think that I'll never finish it. Nevertheless, I enjoyed the experience very much which I wish to you too.
If you have any specific questions, you're welcome.