Alternatively, I could explore hard money lenders.

Your goal is to build a passive real estate portfolio (we can discuss what passive means to you), so while I don't condone throwing $100k into a deal without even a basic understanding, alternatively doing so will teach you far more lessons than reading a book will.  

I'd suggest that there is essentially no tax implication for this as compared to your alternatives.

Alternatively, restructure the loan with equity participation for potential capital gains treatment at lower rates.

Are you saying this would be a good alternative to Pace Morby's Sub To program?

I'm looking for alternatives, I liked LandlordStudio actually but I hate the name, seems so impersonal to the tenants and not in their favor.  

or alternative lenders?

Alternatively, if the bank ( assuming there is a bank) is fine with it, you could negotiate a credit and escrow the funds to be released after you do it yourself.  

Proximity to Major Northeastern CitiesBuffalo’s location near major urban centers like New York City and Boston makes it an attractive alternative for buyers seeking more affordable housing without sacrificing access to urban amenities.5.

You could look into forming a C Corp as an alternative way to own this property that could affect your tax returns differently, I am not a CPA or giving tax advise.