STR in Georgetown is a gold-mine. 

.), businesses or commodities (gold, silver, oil, etc.).

I personally would say your successful friend as a guide is like gold... don't look anywhere else.  

It all cash flows like a gold mine until the roof needs to be replaced, the main line goes, or you get your first turnover bill and need to upgrade a kitchen. 

Quote from @JD Martin: If you have found people willing to lend you - someone with I assume no experience doing this, since you're here asking the question - 100% of the costs of such an endeavor for half the profits, you have found a gold mine and should look no further.

Her team has been doing an excellent job at managing and growing my portfolio consists of core investments ( stocks & bonds) and satellite investments like gold mines, etc.

Hope your next steps are much more smooth and you can take those lessons and turn them in to gold. 

I am convinced that these markets are the hidden gold mine in RE investing today. 

That's being highly weighted through owning debt and generating alpha through gold, alt allocations, little US equities, and little emerging mkt equities.$1mil and getting 75% return on it to get net $40k/monthly, that'd be quite the feat.

You have to realize that if we get another euphoria in the general markets(RE, equities, bonds, crypto, gold, etc.) then places with scarcity in RE will definitively be a pressing subject.