Marginal properties were hit and miss.

This is because they're generally in high tax brackets and high tax countries.Foreigners (Americans and Canadians included) will be taxed in their home country according to their home county's tax rules and their marginal tax rates would generally be higher compared to what Spain will charge, even considering the 24% withholding tax.

Long term rentals have the least amount of interaction required, but short term rentals (AirBnB, etc) have higher profit margins - but require a lot more attention (some companies charge 30% for management and the daily turnover service, for instance).I would suggest you compare your potential rates of return from real estate with other investment vehicles.  

Your profit margin is now $22,000 (44% of the 50K).  

You can get 15-25% of gross booking revenue, which is usually as much or more than the arbitrage margins without the risk.

Everyone is at difference levels in their flipping careers but I explained that in these nicer areas you're going to have a slightly smaller margin but you are paying up for the security of that return.

Often times scammer prey on people with limited money, marginal credit, etc. as they know they can sell them systems for a few K or take a small upfront fee and those people typically do not have the resources to fight it. ( The expense needed to possibly recover often exceeds what they lost). 

Most are 15 year prime+ a margin.

If you only have a little money to begin with then your margin of error is smaller than if you had more money to start out with.  

Looks like this Company is generating cashflow from the margin on the leases and it is doing that with hardly any Capital investment and no risk on Repairs.