We've decided that we'll likely look for something somewhere in Guanacaste because we want beach AND proximity to airport (LIR).We go each August to visit her family. 

They seem to have a great system and I know they spend years before deciding on where to build there projects.

Maybe it isn't worth it, but you should consider the numbers and decide...that could push you towards purchasing another rental. - You mentioned paying down/off a rental and needing to consider the tax implication.

Bottom line, you have to decide how badly you want to own the place, and how much financial cushion you have, and how much risk you are willing to take. 

Appreciate it @Mohammed Rahman decided to sell and move on to the next deal with more knowledge.

Especially for things like population growth/decline, economic trends etc.And what things do you recommend checking when trying to decide whether a location is a good place to invest.

(the “Company”) decided, in accordance with the terms of its Share Redemption Program, to temporarily freeze the Company’s redemption program, effective February 1, 2024.

You could either sell or rent the in-laws' home for a year, move to Arkansas, live in the duplex for a year and move back if you decide you don't like it.

This will help you understand your options and decide if it's the right time to hire a pro. 

Decide what you are going to do then tell them what YOU are going to do.