Here it is point blank.... you can not live on the cayes for $100-200 a month, not even on Caye Caulker. I have lived here for 3 years and live very simply, on the "cheap" backpacker island. My rent for my apartment is 250 U.S. a month, my food is probably 150 a month-I cook at home. I'm a vegetarian (mostly) and I dont drink much (alcohol). If you get down to the basic local diet, rice, beans, fish that you catch yourself with a hand line for free, coconuts that you pick for free, corn tortillas, local grown fuits and vegetables like cabbage, onions, carrots, plantains, bananas, papaya, pineapple. I live on about $500 U.S. a month. That figure doesnt include travel or internet. When someone says... "I dont need much..." I think they are kidding themselves, and I dont encourage anyone to come here unless they have money. I've seen too many people fail, or struggle too much and then feel beat down. Anyway... not that you asked me any of this. The answer is yes, Guatemala is much cheaper to live. The hotel you were referring to was the Miramar here on Caye Caulker? I think you can get a room for $10 U.S. a night x 30 = $300 U.S. a night. Belize is the most expensive country in Central America to live, but for the Caribbean its cheap. Most places in Mexico are less expensive than Belize. I love it here and dont want to live anywhere else.