Absolutely! Let’s hit the sweet spot—cheap yet reliable. Start with the Xiaomi Aqara sensors, they’re super cheap on AliExpress and work great with Home Assistant. For the controller, the ESP32‑based Sonoff Basic is a steal, plus it can run your own firmware for extra flexibility. Look for bulk packs or the “Xiaomi Home Edition” bundles; they drop the price per unit by a good margin. And don’t forget to snag the 4‑channel relay module—just $4 on eBay—so you can power lights, fans, or a coffee maker. I’ll help you tally the costs and set up a quick spreadsheet so you see the savings in real time. Ready to shop smart?