Using a 3D printer to prototype basic hardware at a company that doesn't expect to have more hardware products in the near future
Renting multiple VR/AR headsets for an extended customer demo
-----
It might be worth mentioning that I'm one of the founders of EquipmentShare, which is sort of similar but in the construction industry, so this type of business only seems natural to me. In our industry, the more variability in the equipment requirements of your jobs, the more difficult it is to be efficient with your capital. In construction nobody owns _all_ of the equipment they use; it would require far too much capital, and a large chunk of your fleet would sit idle most of the time. It's far more efficient to have a blend of owning and renting.