Thank you very much! Yes, this helped a lot!
I see you are very well organized...in my opinion, that is solid foundation for every project.
If I've done the math right, that is around 75 hours of work...that doesn't sound bad as it would take me at least double (if I would know what I'm doing :$) for this amount of detail.
I am familiar with those extensions you mentioned for UV texturing, but I found them all hard to handle...a lot of trial and error's wich can be frustrating and time consuming/:-) . So, when you catch some time, please, cover that topic in more detail.
Everything else is pretty much clear...I think
Once again...you certainly have my vote. I wish you best of luck!