Aluminet might be nice, but it's about 3-4x as expensive as the tarp and still only about 50% reflective in ideal conditions. The heavy duty tarps I used
are 100% light blocking (though not the same as reflective) and nice and thick, and yet cost me about $40/tarp rather than $120 for the Aluminet of roughly the same size. For three huts, that can really add up.
The main benefit of Aluminet is whether you want air to flow through the monkeyhut on the shade sides. Airflow is nice, but there are already two open ends on your monkeyhut anyway, so it's not going to trap much heat. My monkeyhut's tarp was too long (12ft rather than 10ft) and partially blocked one end, but it still remained nice and cool all the time. The real key is shade, and then some airflow to waft away whatever heat might build up near the surface.
As for reducing air drag, you can always just box your huts in with vehicles to protect them. Placing multiple huts side-by side also helps. While the Lovemonkey guide doesn't specify it, it helps to put a guylines on the front and back just to ensure that the hut stays on the stakes on the side. After that there is little worry.
For noise, put earplugs in. Yeah, maybe there's some flapping, but there's noise everywhere at BM so between the pulsing bass from some camp nearby, to the laughing of campmates, you're going to hear noise. Whatever you decide, remember that for sleeping you can always block out the noise, but you can't block out the heat unless you have a proper structure.