Importing Large Word Document with Graphics into InDesign

In addition to all the above valid thoughts: ...

A comparative test would be to place the word docx without images. If it flows past 30 pages successfully, it might indicate a problem with one of the embedded images.

That leaves the possibility that one of the images is too big for the frame.

Another simple idea is to open the word docx file in Word and Save-As to an .RTF file. See if the .rtf version will flow into InDesign successfully or not.

If you are contemplating a complete rebuild leaning on InDesign; not Word; then you could also rename the .docx file as .zip and open it to find the subfolder of graphics. These could be moved to a Links folder and edited in Photoshop for size and resolution before placing back into InDesign.

You are attacking this a bit too aggressively, in my opinion. I would go through the Word file first and make every edit possible there, including the use of styles. The Word file should be as clean as possible BEFORE bringing it into InDesign.

That said, if it's a true DOCX file (not a fake Word file saved from a third party word processor such as Google Docs), any placed graphics will come into InDesign in their original resolution as embedded. You can easily select them all in the links panel and unembed them so there is no reason to remove them from the Word file.

Import the word doc without graphics. Normally word graphics have not the file type nor the quality which fits  for InDesign. You should try to get the original file and save for InDesign in a fitting format. Place that into InDesign.

There must be something bigger than can fit into the "standard" TextFrame - your Primary. 

You've two options: 

1) open Story Editor and check what is just after last visible text - there will also be info that there is an "overset", then you can select this text or object, cut it, and paste on its own on the pasteboard, 

2) at the end of the Document - resize your last TextFrame - that is part of the main Story - make it as big as you can - hopefully, this will let you "see" the problematic object / text. If it's an object - make it smaller - if it's a text - check if there is a NoBreak attribute applied. 

All the graphic you've in text - you should get originals - in "printable" format and quality - and link them.