Other than real estate investments, what are hard $ loans for?

[Daniel Young]

I'm looking for feedback and information. Could private lending be used for things like funding materials for a construction company so they could get jobs installed more quickly? 

I'm not soliciting offers... I'm just wanting to understand from experienced people, how stuff like this works or could work. 

Are there other uses/industries that use hard money loans or other types of industries/ loans structures that are attractive to private lenders?

Interested to see your thoughts.