Personally, I self manage but have built systems to allow it to be fully remote and very passive.

Be that person who set's up some STR's there, runs em there, and really caters it to the US "bucket list" tourist. 

But if you see the value in investing money into your own personal education, then maybe this could be a good fit for you.

So the question becomes based on their individual and personal tax situation what is the estimated tax burden they'd save? 

I'd personally sell the townhouse (doesn't sound like it cashflows or would make a good rental property) - you may have no capital gains if you have lived in it the past 2 out of 5 years - I believe the first 250k for single filers is exempt from taxes and the first 500k for married couples.

suggest you think of using digital business cards, but not typical ones like all solutions out there, something that is the first AI-powered digital business card and offers AI persona, which handle client questions and would act as your 24/7 personal assistant. it’s called Avatalk,

Do you provide personalized guidance, or is the mentorship more of a one-size-fits-all approach?

Congratulations on the duplex -My investor clients have acquired several multi-family investment properties locally in the market I operate in Northwest Indiana - Figure out your personal investment objective for the next 4 years and align yourself with the next property that make sense in this current market environment-

This is dependent on your personal situation and strategy.

Overall I would personally consider how I can still grow with the freedom that I have focusing on my real estate.