If this opportunity were to come to you, what method(s) would you use to structure the financing of this "international" purchase?

There are two methods to do this.

In practice everyone must test and develop their own methods based first on extensive research.

Would you generally recommend a BRRRR method over a fix and flip for someone looking to dedicate their whole career to fix and flips or mainly for someone looking to make the most long term profit? 

. , The legal requirements for a bedroom are 7' or more ceiling height, 2 methods of egress, and at least 70 sq ft.

The other poster was right in that the prior owners probably had the homeowners and seniors exemptions, but there may be mitigation methods.

This will give you your Maximum Allowable Offer.Another quick method is take ARV*.70-Repair Costs=MAO.Either way you need to know your repair budget.

Based on your experience as property managers/owner operators of SFRs or small to large multifamily rentals, what are the most effective methods you've used to lease a unit? 

I am searching for the best method to finance the purchase of the flip.

I'm looking to do long term rentals except i have no capitol so i've been digging into the brrrr method the last month using the same kinda strategies you mentioned: 100% funding and no seasoning for quick refi and able to pay back the on the fix flip.