I've read through some past posts but can't seem to find anything about all 3 ?

We're interested in doing a day trip on a boat or Catamaran and/or a trip to Fuertuventura, just wondered what there is and what the approx costs are ? Also where do we book them as we're not with a TO but DIY holiday.

Thx in advance

You can book them down at the Harbour in Puerto del Carmen Sapphire, they have little kiosks. There are plenty of places where you can book trips.