There is no limit to the number of pictures in a post. However, that said, rule of thumb is keep the count to 5 or 6 per post. And then, break up your "article" into multiple posts.
The system creates a new page after a specific number of postings are ... ah, posted regardless of the length of the posts. If a few LONG entry’s are posted with tons of pictures, the result is a really long page with a relatively long wait for the page to load. Neat wagon by the way!
Bill, as soon as you finish a couple of resin cars you'll be hooked! Working with resin is no more difficult than plastic, just.....different.