I'm building a 7x16 V-front. All white, roof coated, 5R in the walls and doors, and 10R in the ceiling. Nothing in the floor yet.
I bought a 5,000 btu window unit for it, but am second guessing the decision.
We don't plan on spending a lot of time inside when we're camping. So if it keeps us comfortable at night, we're good.
I guess I won't know until spring. I think we're about done with the 90s for the year here in Florida.
I made my mounting enclosure big enough for an 8,000 btu.
That's what I'll probably get when this one craps out... Or sooner.

I'm not going outside until the temperature is above my age.