2007 Tango rotten floor source discovered; please read !

That's really unfortunate.....

Most units out there are reasonably trouble free with minor issues.
Then once in a while someone gets this kind of horror show.

I feel for you, I really do. I've had my share of rebuild work too.
I once did a very major rot rebuild of an 81 Citation TT. It was very rotten.
Fixing the rotted wood isn't that bad of a chore. What really takes 95% of the effort and time is getting everything out of the way so you can do that work.

Can you post any pictures of it?

(typo edit)