I'm just finishing the conversion of a small static HTML site (25 pages) to Drupal. I think things went well. I like the ease with which functionality and widgets can be added (via modules).
Now I'm ready to get started with my big site (300 pages). The problem is, there is just no way this (completed) transfer is going to take less than 6 months to a year. (I'll be updating content and graphics.)
Can this transfer be done in parts, page by page?
How would a visitor's request for a page transferred to Drupal:
be identified and shunted to Drupal:
(example.com/drupal/page100.html I guess)
Whereas an unconverted static html page (example.com/page200.html) not redirected to drupal.
Of course, retaining the original URL (example.com/page100.com) for the pages transferred to Drupal would be paramount.