Oh how lovely. They will love it. I remember seeing one of these move to the country TV programmes and as far as I could see if you integrate in the community they help you out. I would suggest your friends should contact local people, learn as much Spanish as they can and use it rather than trying to speak English - that is always appreciated. I remember they had big nets under the trees and they shook the trees, but there was a lot of olives all at the same time and there is a big panic to get them all picked and shipped to the processors. Offer to help neighbours and they will help you - same as in the UK I guess. Have fun when you go over to help them.