Clarifying question: you say you need to cook some of your meals, but you are asking for a propane barbecue grill... does/can the place you are staying provide a 2-burner gas cooktop? Those are very common, easy to find. If you had to buy one they are approx 4500J plus you'd have to get a tank and hose w/ fitting. In terms of 'cooking meals' that's what you need, but if you are specifically looking to grill foods outdoors, then either a wood fire or perhaps one of those coal stoves will suffice. I've seen the coal stoves for sale from a white van along the walkway between the roundabout and the police station, and bags of coal are sold all around.
I suggest checking with your landlord/property manager to see if they can provide anything or are they are okay with alternatives (wood fire, coal stove). Long-term visitors usually pay for their own cooking gas, with the owner providing the cooktop and tank already set up for you, usually with a little gas in the tank to start out.