Maybe just consider it just for a tenant amenity and relieving you the hassle of quarters.

What amenities do they offer? 

.- you or your spouse can qualify as RE professional and the limits the OP discussed do not apply- you can use the “STR loophole” (terrible name) to not have the limits the OP Discussed apply  - a derivative of the STR loophole that for lack of better name I will call the MTR loophole will let you provide amenities to not have the limit the OP discussed apply.I suspect there are many more.  

Also amen to @Greg O'Brien's comment about it being about ROI :-)

Overall, the combination of a thriving economy, vibrant downtown, and natural amenities makes Greenville a highly desirable place to live, driving up demand for housing and contributing to its sustained growth.Could the Upstate of South Carolina be the place for you to invest?

These developments offer the amenities and privacy of single-family homes with the flexibility and affordability of rental properties, filling the “Missing Middle” gap in the market.Another trend that has emerged is the use of light gauge steel construction, which offers durability, efficiency, and cost-effectiveness.

All things being equal, I'd rather not have an HOA with fees, but a family friendly neighborhood with amenities like a pool and playground may bring in a higher rent than other comparable non HOA properties.I don't prefer an HOA, but it's not an automatic deal killer.

I am always amenable to receiving  a bottle of Screaming Eagle in lu of a mentoring fee like the guru's charge :)  If there ever was a guru worth 30k you would be one of those.

You can see what your competition is charging, what amenities they offer, and how booked they are into the future. 

Examples: buying the run down property in close proximity to yours, filling a vacant commercial space with a neighborhood amenity near residential units you own...these are just examples.