I’ve since developed physical access to the property, including 2 lots that are now buildable when there was originally no access to the property.

You can't cut corners, and you can't do it on the cheap and still be protected.If you rely on an entity or entities to protect you then you should not physically provide any service directly.

Are there any physical offices in Houston? 

Historically, on large multifamily deals in the city (B in C+ area) you'll see avg physical occupancy of 94% and economic occupancy of 89%.

But the attorney you use can overnight you the closing package, so you don't physically have to go there.

I will be there physically to collect the keys.  

I closed two philly deals this week.. all of my closings all around the country are mail away.. so its just business as usual.. those that need or want to go to physical closings which i personally have not done in years..

Is it physically possible - yes.

Alternatively, your renter can simply initiate a new payment via Apartments.com.If you believe your renter is breaching the terms of their lease agreement or that the dispute or fraud report is otherwise improper, you should pursue legal recourse outside of Apartments.com (in the same manner as if a renter had placed a stop-payment order on a physical rent check delivered to you).

You would think that they would have a physical location and that many would be hired and trained as customer service agents to expedite things, but no.