Ask HN: How to model cost and revenue structure of HaaS startups

I think they are talking about Hardware as a Service. Essentially a new way to describe hardware leasing that has been going on for decades.

Frankly, if that is what the OP is looking to research, I'd start with leasing companies and how they function as that is the basic model.

haggling as a service

Hardware as a service. Leasing model sounds good to start with. Hard thing for me here is how to combine software services with the leased hardware product.