interested in metrics like growth, rental rates, value forecast, etc.I have seen reventure, the bigger pockets "find markets" tool, bestplaces, and costar.

Once coded you can do the forecast and do the analysis and see if it is worth keeping the property. 

I would ask your buddies about fair trade policy.

This doesnt work , the permit office will want 1 name on the permit as the contractor , yes licensed trades will pull individual permits ( HVAC, Electrical , plumbing )  But that doesnt cover the entire job .

I used to work for Japanese company and have know many friends who lived in Japan and spoke great Japanese and it seemed like about every 3 months they would have some kind of really mind altering experience culturally that was disturbing, so probably not an easy place to live or invest, even if the opportunity is there.Argentina I think prices/trades their real estate in $, so less currency risk. 

You can get better cash flow if you move out further but its a trade off.I was happy with my initial investment.

You’re borrowing against the equity in your home, so the money is not income but rather loan proceeds that you’ll need to repay.The pros of a cash-out refinance for most investors include the ability to build their portfolio and scale their real estate investment business.The cons could be trading a lower interest rate for a higher one and increasing your loan-to-value (LTV) ratio.

You are missing a lot of steps and costs and forecasting of obstacles.I've been through the BRRRR 100+ times with clients. 

If you are a licensed contractor for instance and capable of major remodeling projects as your trade, this would be considered adding value to the property and would risk IRS action.Sounds like "improving" or "upgrading" the place is not allowed.

If you want to move the property quickly and ensure income, seller financing seems more practical despite the tax trade-offs.