A PMC is the ONLY one that will deal daily with your property.Here's some copy & paste advice on hwo to screen PMCs:Recommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

My approach is to take a few minutes per quarter and make sure it is accurate by manually checking my true competition and adjustmenting prices accordingly. 

We have a niche market due to the hospital and university which has pros and cons but my properties have continued to perform well for me.  

Here is the rental analysis data on how we came to $1,610 per unit and, when manually comp we find that's dang accurate for 4br.

Secondly, does anyone know of a good service for accurate revenue estimates for rentals in Costa Rica?

Just a heads-up: with the way the insurance market has been here over the past couple of years, this is accurate as of today, but things could look very different (for better or worse) in 6+ months.

I'm in the Tampa Florida area and it has been very accurate for me and my units. 

(aside from the 1 or 2 homes that have stunning overlook views).When building out your buy box, are you all using the averages, or are you basing your min/max on the cream of the crop listing revenues, even when there aren't clear reasons as to why they are performing so much better than others?

-------------------------------------------------------------------------------------Recommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

A cost segregation study was performed on this single family home in Iowa City, Iowa with a depreciable cost basis of $649,900.