Beautiful collage Davina! It portrays the blue collar trades clearly although maybe a little too generic to sell well (see Mike Savad's trades art). Clever use of blue paint as a texture giving definition, color interest in addition to all the other objects and textures. I'm wondering how many in the trades could afford a print starting at $62. The style is sophisticated could be translated and narrowed to specific professions such as painter, carpenter, engineer, architect, doctor, teacher, scientist, etc.
I would leave this image exactly like it is, as mentioned maybe replacing the other identical measuring tape with some type of ruler, level or other object enabling workers in the trades to identify even more with your collage.