This tends to be more time intensive and more for someone that has a lot of time and limited income as you may find a "home run" type deal with some effort/energy.

Technically yes, but your odds of success are very slim and your potential will be very limited.

I just wanted to make sure there wasn’t a limiting factor of showings or interest.

The problem with selling is a lot of that equity will be lost when you sell it either through taxes or payments to your listing agent.If you ever have the ability to limit these types of fees and still be able to use your equity to fund additional purchases I think you should.

However, if you bought it and managed it as a market rate apartment, your experience would be very different.My point is, I can control how fast a unit turns simply by adjusting my asking rents.  

So there is huge risk expecting the 15 year limit to be reality.  

If you finance conventionally you don't have that limitation, but you can set your own goal. 

The government of Costa Rica has a policy to limit development and doesn't invest much in infrastructure to bring tourism.

I would need to learn more about my options though as my experience is limited to podcasts and a few articles on that subject. 

Cannot control association fees3.