I wish you luck with that one, no pro$$ie would go on a 72 hour booking without a guarantee of being paid.
No punter would take a pro$$ie on a 72 hour booking without a guarantee of getting what he paid for. Will I pay her in advance before we leave UK? Of course not. She may not even turn up, so she will have two options.
a) get paid when we get past customs in Gran Canaria in exchange for me safekeeping her passport, to keep her enticed to stay.
b) get paid at the end of the 3 day booking to keep her enticed to stay.
I prefer option b, as she can always get an emergency passport and fly home or go to the police and say I have kidnapped her and I have her passport. If I show her the money, put it in the hotel safe and say this is yours on day 3, its the safest bet. But then while I am sleeping or in the shower, she could call hotel reception and say she forgot the code to the safe, they will unlock it and she will be gone with the money, her passport and my passport.
I've gone through most possible scenarios in my head, and concluded if either of us wants to fuck with each other, its possible, so I've concluded the best option is to choose someone who you trust, exchange real information before the trip (name, address etc) so that way if it goes pear shaped either way, there is recourse.
It would take a seriously methodical girl to plan to rip a punter off in a foreign city they have booked or the punter must be a real cunt to force her into fleeing mid-punt. Sometimes overthinking things isn't always good. She needs the money, I need the sex. Its a business deal. Everyone leaves happy, no dramas!