Outside of places like San Francisco the few dozen square feet per machine isn't going to be a big deal.
On top of that it can produce multiple burgers at the same. I assume the revenue per machine is potentially 5x of that (or more) which is $691200 per year.
Making money seems like the lowest priority item on the very long list of potential problems with this machine.
Cleaning and restocking? Those are still unsolved and might even be impossible. Making more money merely requires "revision 2: now 30% more efficient!" or just building more than one machine.
Of course there are other expenses such as maintenance, deployment, development and upgrades. But those are the things this company is likely trying to optimize.
I'm not sure that gives them much, though -- restaurants are pretty capital-intensive, and on those economics the marginal savings of not having burger-flippers doesn't add up to a lot of advantage. Maybe it would be better to sell your machines, to become "the Coca-Cola of burgers" rather than another McDonald's.
Established players don't want to develop these machines in-house, but if you provide clearly better value they can and they will catch up. They'd probably rather buy the technology, though.