The sane way to handle renters vs owners is to restrict the amount rent can increase per year. It might slow gentrification and decrease profit of landowners but it would solve this restaurant's problem.
I own property in The Netherlands and rent it out to tenants. There are increased risks for me because tenants have a lot more rights in The Netherlands than in the USA. But having been a tenant in the past I can appreciate the stability that comes with restricting rental increases.
Does it mean I probably make less money? Yes.
But I like being able to walk around my city and not see homeless people everywhere.
It might be a demonstration that rent control without appropriate planning controls doesn't work so well. But that's a very different claim.
Very good ideas, comrade.
Businesses operate on leases, and usually long term leases, like 10 year leases for a restaurant. This will protect the business for the duration, then when it is up, its up.
I'm a commercial real estate appraiser. Real estate already has very low margins (10% - 20% for strong operations) - how do you expect the property owner to maintain the property (expenses, taxes, mortgage) and make enough of a profit to consider holding onto said property? Let's turn that around - you presumably like your job. Now, take a 40% pay cut - can you still afford to keep your job?
NYC has rent control, and it's hardly a vast slum.
And as a counter-dynamic, overbuilding and its associated crime rate increase is another way to turn a city into a slum. Few things breed crime like abandoned housing.
Grocery stores average a 2.5-3% profit margin, and I'd consider them a pretty essential business (because, you know, you have to eat).