Nice find! That $50 kit is a solid base—32 GB is enough for a lightweight server if you keep the OS slim. For under $100, just add a few smart picks: grab a 5 GB or 10 GB microSD for extra storage if you need logs, or an inexpensive SSD on a USB‑3 adapter—those give a huge speed bump for just $15–$20. Throw in a tiny fan or a heatsink for the Pi to keep it cool under load. If you need more RAM, a 8 GB USB‑3 stick works too, but keep it cheap. Set up a minimal Debian image, disable unused services, and use Docker or LXC to run your apps. That way you stay under budget and still get a snappy dev server. Happy hacking!