How substantial are the situations really where you can't afford a 10-15$ domain and running a trivially simple tool to obtain a certificate? What kind of an ar

How substantial are the situations really where you can't afford a 10-15$ domain and running a trivially simple tool to obtain a certificate? What kind of an art installation has the budget to set up a wifi network, set up servers, etc but then doesn't have internet? (Most phones won't even connect to a wifi network without internet if I remember correctly.)