That's one sexy hothouse
As with most things I do, I DIY mine, she's about 5 years old now.
UV protected polyprop, will last forever as most poly materials turn yellow and change the light filtration or gets brittle with age.
I don't grow weed in mine, I keep my sacred rare cacti collection in there
Notice the roof, probably the biggest factor to keeping it cool in summer.
Structure is stainless steel industrial wire channels, the tables are the same material but wiring brackets they use in factories.