Exactly. The part where the owner raises the rent and eats the profit is a horrible thought. But it made me think. Take a look at the World's 50 Best Restaurant list Top 10 [0]. 4 out of the Top 10 are located in cities that I expect the rent to be below national average. I myself have dined at Azurmendi, which currently sits at a hill top somewhere in the Basque countryside, really remote. Maybe they can afford to be remote and pay less rent because they are on this list or strive to be on there.

[0] http://www.theworlds50best.com/list/1-50-winners