It's likely they may even use data of SFH with similar lot and building square footage.

If you've got to ask a question on an online forum about managing an out of state or out of country renovation, you aren't ready to do this on your own.

My wife and I are looking into building a duplex on it.since I am still learning on investing in real estate.

20K a month and he had several buildings!

Again, this is a conversation to have with your accountant to ensure the benefits would outweigh the costs.Another misconception is that there is little value in a cost segregation study for properties that do not have a lot of personal property in them or very little interior build out, such as industrial warehouses.

When I return to the country after my Au Pair contract ends, I hope to live in the property as my primary residence and house-hack as well.I understand that investing remotely makes things more challenging, but I am also ready to be uncomfortable and challenge myself in this journey as I know it is 100% possible.

We know that they’re building up, it's near a hospital and it is a good neighborhood.

I have read I will need to use a third party service to make this happen.  

You can also look into building a rental portfolio which is a little less hands off compared to flipping.

Depreciate 75% of the building value (excluding land) over 27.5 years for significant tax savings.