This is very state and local specific to the rental location. 

Hey @Keith Mintz, this was the standard AirBNB model when they started.It isn't something I am interested in, but if you do a search, you can find more info.

They are a young engaged couple, and we actually have a few acquaintances in common (a connection we discovered when they were moving in). 

Compared to the US, the financing is different (if you need any), the legal system is different (you need to vet the parties), pre-construction works differently (if that's what you want to buy), the buyer/seller psychology is different, ...It's important that you get the needed knowledge or work with people who have it and have their interests aligned with yours.I have replied to hundreds of posts about investing in Mexico over the years so you might find some what you look for there.

Forgive me if this has already been asked.

I haven't been following this too closely but this is what many various news sources have reported and I believe that's why he's being sued and is supposedly under investigation). 

This isn't solely a Philadelphia problem, but it's exasperated by the amount of power and influence City Council members have over their districts.

Obviously this depends on the amount of your loan, when you start to pay the extra amount, etc.

Can you chime in on this topic(home owner/rental dwelling/landlord insurance)? 

I helped my clients purchase this property in 2019.