Scenario 1

Account A has 7 different sites and each invoice gets billed to the respective site, site 1, 2, 3 and so on. This one seems easy, I assume we create a parent account and create separate child accounts for each site?

Scenario 2

Account A has 7 different sites but all billing goes to Company A. Sometimes the different sites could simply be a small campus. Do we create the sites as Contacts? Or do we still create Child Accounts?

Thank You