What would I have to gain from that?

MTRs are great, and there is a lot of opportunity with the different medical facilities in the area, as well as the influx of military and the gaining popularity of MTRs among the general public, not just traveling nurses.

From there, you can utilize that team to gain experience and understanding into the market.  

This first season is for you to gain hospitality and property management experience and reviews.

You can't compete against the all-inclusives unless you offer complimentary food and booze or you're cheap, as you seem to be confirming.This being said:1) Properties in Mexico/Cancun trade in USD so you have no foreign exchange risk in Mexico while properties in Colombia are traded in COP, the Colombian peso, which has been tanking over the years, eliminating any hope for capital gains for American investors.2) You can get a mortgage in Mexico but you can't in Colombia so even with lower revenue, Cancun would likely still be more profitable, even if you don't take capital gains into account.3) The political risk is much higher in Colombia, especially at this present time.Is Cartagena a bad investment?

Do you have any feedback from guests that suggests it is appreciated and valuable? 

What would they have to gain from that?

It takes a lot of work to find a tenant, your commision gained from the income should only be for the services rendered while the tenant is in the home ( in my opinion ).Some additional fees I can think off, are maintenances fees, for larger projects that require a lot of management and research.

Even if it does appreciate, the only way you realize those gains is if you sell.  

This can be a valuable resource for finding potential deals.Networking with Local Real Estate Groups: Joining local real estate investment groups or forums can be beneficial.