prompt, kami cafe (trad + dev)

I want to design a home lab called 'Kami Cafe' that simulates a small business that also develops software. I want a hybrid setup combining traditional on-prem infrastructure (file servers, databases, internal web apps, email) and modern SaaS/cloud practices (Git repositories, CI/CD pipelines, containerized apps). Employees should be able to do normal work (email, file sharing, POS, spreadsheets, internal web apps, limited web browsing) while I maintain and troubleshoot the infrastructure. I want a step-by-step build plan including: VM specs, network layout, IP addresses/VLANs, services to run, simulated employee workflows, monitoring, backups, and daily troubleshooting exercises to practice Sysadmin/Cloud/DevOps skills. Create this full detailed lab plan.