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.

Are there any local meet ups or websites on where to find more people who have a moderate level of experience meaning they are  somewhat experienced but still looking to collaborate and network with more inexperienced investors like myself.

Tell me - someone selling their home to your son, Subject-To - is this a person who has made good life choices? 

I have personally used the BRRRR strategy over 40 tiems my self in Memphis.

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)).

CPAs generally have more knowledge about general accounting but it is ultimately up to the individual person to take it a step farther to get more specialized.

A contract is only as good as the person enforcing it.

Would even be happy to meet in person since we are in the same area.

I personally believe that a better way to jump into mid term rentals is to take a course on buidling a property management company or cohosting business where you bring your skillset to the table without the intial investment into all the furniture and leases.

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