That is a beautiful van! He has some mad skills.
I sure hope he has some special insurance for his RV conversion, because if not and some idiot without insurance causes him to wreck it, the insurance company won't pay a fraction of what it cost just for materials, let alone the hundreds of labor hours involved in designing and creating his dream machine. At least he has his website to document his labor of love, if needed.
I built a Velcro attached screed door for my Aliner, but I never use it. I find that if the climate and weather is pretty enough to leave my door open there are few bugs, but if it's hot and muggy and there are plenty of bugs, I button up and run my AC. If it is cold I run my heat and leave my screened windows cracked or opened as needed. Anything in between I can open my 2 ceiling vents and windows, putting up or removing Velcro attached Reflectix over my windows as needed for both temp control and privacy. The Reflectix effectively keeps the heat in as well as out too. He could employ similar strategies to regulate the temp. if he didn't have the stylish chalk boards over his windows. Plus his van has the added advantage of massive flow through ventilation by opening both side and rear doors, something my Aliner does not have.
Chip