A retail company is planning to migrate 40 on-premises applications to AWS within six months. During discovery, the team identifies a group of internal reporting applications that run on aging physical servers. Analysis shows these applications are only accessed by a small finance team for a few hours at month-end; utilization is near zero the rest of the time. The company wants to minimize both migration effort and ongoing operating cost, and it is willing to accept slower response times outside the reporting window. Which migration approach best fits these applications?