David, these inspections are unnecessary, about 20 years without mandatory inspections has proved that, why introduce more regulation and cost? Ok they sound like a good idea and I am certainly not against others looking over my aircraft projects, in fact I invite them, however mandating such is only adding burdensome paperwork and cost unnecessarily. For what good reason to add more regulation? There is no proven safety issue! So why more regulation? In kasper's case nearest L2 3 hrs away, eg if that is 200km that would total about $400 x3 just to cover travel plus the inspection itself, and that is a significant cost burden, quite a lot more than your $160 x 3 for a building worth hundreds of thousands, compare to aircraft worth only tens of thousands if that.
It is not a CASA requirement!