Hey everybody, let me give you some info,
About the food, there is a vary of food that you´d like to prove and love to eat, there are different kind of restaurants, like chinese, american, french etc etc.
The accomodation price it depends on what part of Guatemala you want to live at. The best places to live at Guatemala City are Zonas 10,14 and 15. The public transportation is highly not recommended! Is better if you buy a car or move on cabs. All the services are, well lets say cheap compared to another countries and all of them accesible.
In another words, the cost of living in this country is cheap compared to another countries in Central Americ. Let me write a list of examples living at the exclusives areas of each city:
Antigua Guatemala, $4000/month/2 persons
Guatemala City $3500/month/2 persons
If you have any question, let me know, maybe I could help.

Douglas.