Myself and two friends are planning to try living and working remotely this winter for a couple months. We're looking for recommendations for places to consider in Central and South America.

Our basic criteria for a potential spot:

• Dollar goes far (trying to keep spending relatively low, no budget but ~$3k/mo (including rent) would be ideal)
• Good internet connection, as we all work remotely and will need to be on occasional voice calls
• Walking distance to a beach or body of water
• Flexible on city or town size. We don't necessarily want to be in the heart of a major city, but likewise don't want to be in a small town in the middle of nowhere.

I'm happy to provide more details in the comments. This is the first time any of us are doing something like this in central/south america. So any advice is appreciated!

We've done some preliminary research and are expecting to not have the same comforts that we would in the US in some places, but want to at least find a spot that would be enjoyable for a 1-2 month stay.