Well I know is far, but is lovely place: MEXICO
The tiket is gonna be expensive, but there everything is cheap, you can eat with £3 and good food. The weather is amaizing, is a lot of diferents places to go.
Mexico City: is very big city and is not really dangerous like some people say, is massive City the 8th richest in the world with all kind of restaurants, bars, clubs, 24 hours, cinemas till midnigh, very good food.
Acapulco: Is the nearest beach to MExico city is very very very CHEAP!! totally safe, with very nightlife a lot of clubs all days in the year, lovely beach, you can swim even in winter time.
Ruta Mya (Veracruz, Chiapas, Oaxaca, Tabasco, Merida): All this countrys are very country site, with a lot of vegetation and green very very very CHEAP!! (£1 or £2 food) and with a very nice arqueologic monuments.
Well honestly allmost all Mexico is like THE HEAVEN!!