@Peek_A_Boo Mmmmm, I've not done Fuerteventura but the climate was beautiful when I visited Tenerife so can imagine. So much beauty there once you get away from the tourist traps.
Acquire weapons-grade nuclear material: You'll need enriched Uranium or Plutonium, which can be obtained through illegal means or by stealing from a nuclear power plant.
I hate to break it to you, but the stealing thing is also illegal.