In an exploration of alternative setups for the ELK Stack, PJ Hagerty discusses deploying the stack on a Raspberry Pi instead of using cloud services. The experiment highlights the use of a Raspberry Pi Model B, running a Debian variant called Raspbian Wheezy, to install and configure Elasticsearch, Logstash, and Kibana. The process involves updating system packages, installing a suitable Java runtime, and configuring network settings for each ELK component. Although the guide successfully demonstrates the ELK Stack installation on a Raspberry Pi, Hagerty emphasizes that deploying it in the cloud remains the optimal solution for production environments due to ease of setup and maintenance.