Captain Joseph Tivy photograph mystery

A wagon bearing the name Capt. Jos. A. Tivy
Where was the photograph taken?

Mysteries -- local history mysteries -- come across my print shop desk most days. This particular one came in the form of a very (very) dark negative.  It was so dark the image was not visible to the naked eye.  I was doubtful about my chances, but I put it in my trusty scanner and adjusted the settings to a level likely to coax an image from the old film.
What was there surprised me: a wagon bearing the name of Captain Tivy.  It is decorated with flags, as if for a parade.  I wondered where the shot was taken, and I wondered when it was taken.
The building didn't look like any building in Kerrville I recognized, but it did remind me of a building I remembered in Fredericksburg, an old house at 243 Main Street.

243 Main Street, Fredericksburg, from Google Street View.

Checking closely between the two buildings, I noticed the balconies were different.  But in all other ways they appeared to be the same, down to the number of stones from the roof to the porches, and the supports under the eaves.  I'm satisfied the photograph was taken in Fredericksburg, and that the wagon was participating in a parade.
Captain Tivy died in 1892, though this picture might date after that time.  Wagons aren't buried with their owners, so it's entirely possible this shot was after 1892.  But I'd like to think it was taken in 1892 or earlier, and I'd like to think Capt. Tivy was holding the reins.
So why would Tivy have a wagon in Fredericksburg?
It could be he drove it over for the parade.
Or -- again, this is speculation -- it could have been in Gillespie County in conjunction with Captain Tivy's real estate development, Tivydale.
Captain Tivy sold tracts in "Tivydale" from about 1877 to 1885.  Perhaps this wagon was a part of that effort, used to transport prospective buyers out to see the property.
If anyone knows the age of the house at 243 Main in Fredericksburg, that might be a clue; another might be when they added the second floor to the building just to the left of the house.  In the old photograph, that left building is only one story high; in the new image, you can see the outline of the old one-story building.
I'm thinking there's a chance the photo was taken in 1886, the fortieth anniversary of the founding of Fredericksburg; the 110th anniversary of the Declaration of Independence.  Again, that's just a guess.
If you have an idea, let me know in the comments section below.

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