Rent control laws are market specific.

You point out specifically "... on forum run by his publisher." 

How specifically could they have done that?

My biggest advice for people would be as follows.Know why your in the real estate game, and why a specific niche.

Most foreign buyers are high net worth individuals who want to park their money there in a safe haven and they don't need BP.No restrictions apply to American buyers in the countries they'd generally want to buy, including those mentioned by Federico and many other popular countries.When it comes to Spain specifically, some more conservative banks will ask you for a 40% downpayment (that would be the maximum) but that isn't the rule.

Is it from experience of there are tools out there that show numbers on specific areas?

Cleaner is paid a fixed rate for a specific job, you are paid a % of revenue.

There are a high number of CPA firms that do not want to get involved outside of the FYI to their clients, and some state boards are saying that a CPA advising related to this registration is an "unlicensed practice of law" given it is not under Title 26 - income taxes - the only place where CPAs and EAs are specifically authorized to interpret law. 

Eager to hear if anyone has any more up to date information about Costa Rican REI in general and/or VRBO specifically

They won’t offer financial advice or specifics about what they think you should do but are there to answer questions and help you look at things from different perspectives.