I think these machines are fascinating and I see them being used for model plane wings but what is their main purpose. Lost foam casting? What are you using yours for?
Construction industry - creating columns, column caps and facade decoration.
Trade shows - large scale models of products, decoration
Theme parks - scenery, props, etc.
Sign shops - Monument signs, Letters, Decorations using highly compressed foam, Awning props
Box manfacs - Packing cores for customer samples
Rental companies - Wedding arches, Party planner designs
Worry about success, failure takes care of itself.