I wanted to build the cheapest possible Lightning setup that actually works under real-world constraints. In Cuba, that means unreliable electricity, limited internet, and zero access to commercial hardware. So I used an old Android phone running Termux with Core Lightning and Electrs. Power comes from a USB power bank charged with a solar panel. To avoid syncing the Bitcoin chain over the internet, I copied the data from a friend’s node using an SD card. On top of that, I’m using LNbits with Phoenixd to give local merchants a simple way to accept payments without relying on custodial services. It’s not fast or pretty, but it’s fully self-custodial and functional. It’s also the beginning of a small circular economy here. Curious if anyone else is building or running Lightning setups under similar constraints. Let’s compare notes.