Analyzing the specifics is basically the same.

Nobody has a pool in their homes so #1 it is an anomaly #2 guests can enjoy the pool year round#3 kids don't care how small it is#4 there are adults who want to enjoy a heated pool, but feel self conscious in a bathing suit in front of others at a resort pool, now they have a private pool they can use with their family and not have that issue.  

I am interested in beginning my real estate journey with short term rentals abroad, more specifically studio apartments in major metro cities around the world. 

The seasoning shouldn't be an issue. 

With Fannie Mae Small Loans, you can't rate lock until Loan Commitment is issued, typically ~2 months after you go under application. 

I have a few specific questions and would greatly appreciate any advice or insights you can offer:Tenant Communication: What's the best way to introduce myself to the current tenants and inform them about the change in property ownership?

Consider using a local lender as they tend to be more familiar with the specific market you're investing in.

I think this would eliminate the possibility of triggering a “due on sale” issue because the property is already in an LLC and I am only selling interest in the LLC.

I think there are multiple ways to address the issue.  

The lender will only communicate about a specific loan with the borrower.