That AU-18-150 looks like a minature version of the Fairchild XC-120 Packplane. Fairchild only built one prototype.
During the 1960s, Sikorsky sold a similar-concept Skycrane helicopter with a variety of cargo pods. Skycranes were primarily used to hoist heavy loads. Nowadays, a few Skycranes carry quick-attach water tanks when fighting forest fires.
With only 75 horsepower per side, the AU-18-150 would be seriously under-powered. It would struggle to maintain altitude on a single engine.