So I just had a guy around to quote getting this done on my property (I also totally forgot he was coming around so didn't prep myself for this!) but he went around the property with an FLIR camera. The indicative quote figure I got means I can put almost 100% of this onto the ANZ Healthy Homes interest free loan.
I'll likely be going ahead with the install. The wool they use is made of glass and he states doesn't settle like actual wool does. The injection holes are also tiny. The amusing thing is they've actually used @wheelbarrow01's statement on their website: https://insulmax.co.nz/project/geekzone/
How much did they quote you? and how big is your house?