Operating a SaaS app is like running a one-room hotel that has unlimited occupancy. It’s as if you’ve figured out how to rent the same hotel room to many guests at a time through some weird tricks of quantum superposition. It is the greatest business in the world.

Customers pay for your hotel room by the month. Each one gets the same basic setup: bed, desk, and Wi-Fi that never works when you need it. When you make changes to the core room, all guests get the new version. But they can also request customizations personal to them, like a wake-up call—5 am for the gym rats, 1 pm for the barflies. Guests tend to stay for months or years at a time, paying for the same room as everyone else.

It is an absolute license to print money.

Quantum hotel rooms are not all roses and free cash flows though. There are two crucial things to know about being the owner/proprietor of a business like this. The first is that transitioning from a single-user room to infinite occupancy takes effort. Your quantum superposition technology is a little complex to build. The second is that the longer you’re in business the more of your time and money you’re going to spend enabling “personalizations” for each guest. In the end, each guest customizes your hotel room so much that it looks like their own home.