IMO this is much too little additional return to put your personal residence at risk.  

Did you find any additional help or learning concerning over-the-counter tax line investing for Texas?

The 50% is rather deep a cut, especially with all the additional operational expenses not included into that 50%.

I’m involved in a private LLC that owns land in which we are asked to provide additional $ for property taxes every year.  

Does anyone know a property manager that supports small self-storage rentals in addition to residential rentals?

For payments, tools like Stripe, PayPal, or booking software like OwnerRez work well.Happy to connect if you’d like to chat more or need additional tips!

These are professionals with additional training and a stricter code of ethics.

Might be an additional cost there.If units are updated, capex items look good, leases and tenants look solid, and there are no other regular expenses besides the 5200 in insurance/property taxes then I like this deal.  

So additionally, that there's only 30 days to close and it eats up time for an inspector to schedule time to come.Do you allow inspections of your contracts?

Many insurance companies do not allow adding a landlord as additional insured.