The only time I ever heard from the number was a generic "welcome" text and then another message when I asked for a refund to contact his team.

It is the change in tax structure from an S-Corporation to a disregarded entity (what an LLC wholly owned by you would be for tax purposes). 

You can change your interest rate through refinancing, but you can't change how much you pay for the house after you purchase it. 

This bustling market sees properties swiftly changing hands, with a median time on the market of just 16 days.

If and once it's done I shouldn't have to worry about it ever again. 

Specifically, I'd like to consult someone during a change in tenancy to make sure our contracts and everything is up-to-date.

Because yeah, the only thing that changes is the dang paperwork and a few minor details. 

I called Zillow and they told me they don't handle lease cancellation or changes but suggested to contact local attorney (I am in Texas/Austin). a) Take some penality and allow tenant to break the lease. b) take re-letting fees, list the house again and current tenant is bound to honor until it gets leased.For both a) and b) I will still have to contact attorney as Zillow does not let me cancel the lease but only mark the lease cancelled once it is done. 

My experience with the concept is more centered around the UK and the FCA (UK's equivalent to the SEC).

Honestly rental arbitrage has been the best thing ever.