What sand did you use? I think you are supposed to use a bit of sharp sand in the mix but a lot of roofers ignore this. You can buy a dry readymix just add water product, think it comes with some kind of certificate.
So was the quote something like reducing a room temp by 3 degrees? It all helps but can't see the other half being content in peak summer. Airconlite is probably a better term. I am more imagining my missus nicknaming it fake aircon if I installed it and it was ineffective.
This summed up my thoughts. The other ones @JohnMo mentioned look a bit sleeker. These FCU seem pretty deep profile don't they? I suppose you can't get a fan and effective cooling in a slim profile.
Whats the difference between those trimley and a standard fcu? I know nothing. Those trimley don't appear to be the nicest looking things. I looked at the cooling performance I can just imagine my missus moaning that the fake aircon isn’t doing the job properly. I presume similar to other fcu? I suppose the limiting factor is the dew point of water.
A more reliable indicator with vans is to look in the back see how all their tools are kept. Neat or messy. I've never met a neat worker who has a messy van and tools. Maybe they exist but ive not met them.
A lot of Australian housing is serviced plots sold by land developers who build roads and infrastructure. Then builders have a number of home designs people can choose to have built on the plot or customise the design or even go bespoke. Obviously all differing costs. It does end up very low density and needing cars though which is not ideal.