Hi… I´m a producer here in Colombia. Outside Bogotá, the problem could be unexperience crew and difficult to find some equipment, but in Bogota, medellín and Cali (3 main cities), you´ll find from the basic cameras or audio to the latest 35mm, HD etc… the same for audio, lights.
Shooting in most part of the country is safe, but you need to know that also there are very dangerous places, so better ask the police or the army if you want to shoot in the country side or even in some parts of the cities.
It´s cheaper than countries like Mexico o Argentina, and also hotels, transport and food could be really cheap.
If you need city permits, better ask them with some anticipation, otherwise coud be a real pain to get them.
If you have any particular question, please do not hesitate to contact me.