OK - let's first start by insulating all the walls. Right now, there is little use "generating cool" as it will immediately be sucked out on hot days.
I would suggest an easy fix - use two layers of 1 inch "blueboard" - aka closed cell foam. It has an R value of about 6 per inch so you get up to R12 or so - a huge improvement.
This stuff can be glued up to the walls and ceiling with construction adhesive. The boards come as 8 x 4 foot sheets at big box stores (Lowes, Home Depot, Menards, etc) for about $15 a sheet. Easy to cut to fit. Forget the floor unless it is above a crawl space.
This is a one afternoon job and it will do wonders.
Then we can tackle the cooling issue. I am leaning toward a small window AC unit as it also dehumidifies. You don't want humidity around transmitters . . . .
Steve
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consulting on geothermal heating/cooling & rational energy use since 1990
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