With TAPPaaS we are building a small, composable private cloud for homes, communities and small organisations. It should feel like an enterprise‑grade packaged solution, but be built fully with FOSS and declarative Nix/NixOS tooling. Our current design is a 2‑node cluster with a third backup node, using Proxmox as cluster manager, NixOS and flakes for all VMs running platform services. All changes go through GitOps workflows, and services are packaged as NixOS modules that share central identity, secrets, backup and monitoring. We will show the architecture, NixOS/Flake deployment structure and CI/CD pipeline, and how declarative configuration helps with upgrades, failures and restores. This talk is for Nix/NixOS users and operators who want to turn homelab ideas into robust platforms for real organisations. We will share what works and where we struggle, and invite experienced nixers to challenge our choices and point us to patterns and tools we should adopt.