Example for a first trip:

Cheapish hotel p1500 x 20 = p30,000 ( Remember to ask for discount...at least 10% if staying for more than a few days in the same hotel or apartment.)

Food and drink for two p1000 x 20 = p20,000

Total BASIC costs = p50,000 @ p61/£ = £820.

Myself...probably only p1000 per day for room, plus p500 a day for food, so BASIC costs = p30,000 = £492.

One of the biggest savers is being careful where you eat, and what. Try some local eateries.