MQTT n8n Power Meter Integration

I have a power-meter sensor that already speaks MQTT and I want its readings flowing seamlessly into my self-hosted n8n instance. The goal is two-fold: 1. Real-time monitoring with threshold-based alerts so I immediately know when consumption spikes or drops... (Budget: $30 - $250 USD, Jobs: Alerting, Data Analysis, Data Integration, Data Visualization, MQTT, n8n, PostgreSQL, Telegram API)