LOL I do have remodeling experience so it's just knowing that I probably only have about 10 years left to do physical work. 

I work with a lot of Investors that submit offers without physically looking at the Property. 

My biggest worry is vacancies eating into my ROI, especially if I can’t be physically present to market the unit or fix issues quickly.

If you need a lot of hand-holding on deals or access to a physical space, this might not be the best option.

I would appreciate any physical paper book recs on these topics.

Thank you for making me clarify my language.You're right, the low expense ratio points to efficient day-to-day management.The "value-add" or "operational improvement" in this case isn't about fixing a broken system, but rather about stepping in to capture the final 17% of physical vacancy.

Value came from speed, access to capital, and sharp execution rather than physical improvements.

On the physical side, that often meant rehabbing and repositioning distressed homes: addressing deferred maintenance, modernizing interiors, and improving curb appeal.

Begin with those - visit them physically or visually quickly and determine if any are genuine prospects or cross them off - quickly.

I self manage my Airbnb even not being physically there it’s easy.