I worked temp as a word processor for many places.

A former company had all images "INLINE WITH TEXT" and set to a style called "Picture" which had paragraph spacing above -- don't recall if they used 6, 9 or 12 points above. They also had a style called Picture Caption, which was centered, bold and also had spacing above of 12 points and 0 below.

Another company insisted on having all pictures INLINE with TEXT and set inside a 1 cell table with White borders 6 points wide.

Possibly you could adapt one of these ideas to fit your needs.