If someone injures themselves and sues, they will be suing the LLC and not you personally.

I typically don't comment on other's businesses unless I know from personal experience.

I was thinking if I can talk to my neighbor about sharing the cost (I, the landlord, personally provide labor and my neighbor provide material (e.g. fence pickets)).

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

Personally, I wouldn't offer SubTo or a Wrap, For reasons I've written about fairly extensively. https://www.biggerpockets.com/forums/70/topics/1227199-the-m...However, I would sell on "Lease Option" and that may work for you.

For instance, said property manager manages maintenance issues, problems that arise during bookings, basically anything that needs a physical person at the property, while I manage the rest?

Any recommendations on Houston REI groups that meet in person or virtually?

While Facebook Marketplace isn't the sketchiest site (craigslist), I personally would never give my ID across it.

I personally use 40% but I'm also in a higher rent area.

Be prepared to follow up multiple times, using different forms of communication—calls, emails, and if possible, in-person visits to their office.