So I am not sure whether I really need sources of passive income right now considering that I have a lot of energy that I can spend on investment strategies that require more efforts and energy.

It's a ridiculous amount of time, effort, and money. 

As others have inferred, you are in the hospitality business, and this is going to take full-on effort.

In a small effort to be a help here;  my best tip is still to join a local boots on the ground REIA. 

An actual long-term lease3. continued efforts to rent4.

Do you or not believe in Global warming?  

Lenders typically look for a DSCR of at least 1.0, meaning the property generates enough income to cover its debt obligations.Benefits for Foreign Nationals: This type of financing is particularly beneficial for foreign investors because it often has fewer documentation requirements, allowing you to leverage your property’s income potential rather than focusing on your global income.2.

It was well worth the time and effort.

How is each member compensated for their effort?

If you run 2 scenarios with same inputs but toggle the “extra payment” scenario in an effort to compare, it reduces your 30Y traditional timeline (as expected).