although they may not be raised in a federal court unless one finds similar wording in statutes or case law, various international treaties "affords" some vaguely worded property rights also. Obviously the word free below doesn't mean without financial burden.

UN iccpr

UN continued

OAS American Convention on Human Rights

source:
https://law.justia.com/cases/federal/district-courts/BR/19/635/1957440/