I live in Bakersfield. There's almost never any wind and It's snowed a total of three times in my 40 years of living here. Losing heat isn't really an issue.
That said, I'm giving some thought to selling this one for about $3k and building another with a few upgrades.
I'd like to start with one of the Lowes' $500 trailers (with highway-rated tires and shocks already built-in)
I'll lengthen the "forks" so that the levelers don't have to be cranked up all the way to fold them up.
I'd also space the forks a little wider so that I can put a full inch of insulation around the firebox.
I'd lower the air inlet valves to clear the tongue a little better.(It touches when they're open)
I'd make the firebox an inch or so taller and set the firebox under it a bit more(making it a bit longer, too)
And yes, I'd insulate the smoke chamber to make it more efficient.
I'm not at all sure I wanna start over, though.
That was a lotta freaking work!