If you know the approximate window of time the theft occurred, are there any businesses on the street with surveillance cameras that were aimed at the street? They might have captured the TV and your HTT as it passed by, thus providing a clue to who the perps might be, the direction they were headed and the exact date/time of the theft. Since your initial posting mentioned that your office was across the street from your trailer, you must have some business "neighbors" that, even if they don't use surveillance cameras, might be able to refer you to a business on the street who does.
Just an idea if you haven't thought of this already.
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TV: 2009 GMC Sierra 2500HD | Crew Cab | Std. Box | 4WD | Duramax/Allison
RV: 2000 Jayco Eagle 266 | FBS | TT -- 1986 Coleman Laramie pop-up -- Still in the family!!!