You are best to stick to small towns. Right next door to Melaque, is Barra de Navidad... both are lovely and can be inexpensive. I would suggest you take a vacation there (or anywhere you are thinking of) before deciding to stay for a few months. In both of those towns, there are a lot of Canadians and Americans who live there until it gets too hot (and some are there year round.) It helps to know Spanish in these small towns because it's not like PV or someplace where 'tourist' staff speak English.