WRT to the scenario in the first post in this thread the answer is no. IMHO that is just asking for trouble and I don't feal a need for us to buy into other peoples problems.

WRT to the title of this thread the answer is yes. It depends on the interpretation of Job and client provides equipment but there are many scenarios where we did that.

Has there been cases where clients have moved and wanted us to uninstall their old equipment and install it in the new place? absolutely.

Has there been cases where a client upgraded their home and then wanted us to install their old equipment somewhere else as a second job. For sure

When we deal with an international (or across country) install do we provide the equipment, absolutely not. What we provide is the know how and supervision to our standards.