1. Travel to the farlands in the faction server if it doesn't have a world border limit.
2. Once at the farlands, travel deep inside of them like 5 month walk or so.
3. Build an obsidian base with water surrounding all of it, along with enderchests.
4. Place your base shit inside of the defensive structure.
5. ???
6. Profit!

Tip: Your base will be both (impossible?) hard to travel to AND hard to bust into.

Hope you guys enjoyed my special coming-back-to-BTC tutorial! Thanks!