Sorry for the edit. I checked the price in my software.
Evening, Ian. Hope this post finds you well.
A multi million dollar estate or manor home I take it.
Likely each of the 9 bedrooms will have a bathroom.
Likely a maids quarters, but it is a 9 bedroom estate nonetheless.
A square footage cost can be calculated but the estate is anything but typical/normal and one should be prepared for this size of real estate property.
1: One might think commercial and have an independent HVAC and electrical contractor present.
2: A helper would also be recommended.
3: An extra camera and spare batteries.
I would start between >< $7,000.00 - $8,000.00 but need to glean the listings to be accurate.
$6,500,000,00 price tag for a manor was the largest estate value I inspected.
I charged $2,100.00 plus $175.00 for the pool applicable taxes.
Relatively easy to inspect mind you. The report was roughly ><10. The inspection, 5 hours.
Anyones insurance liability will be strained by a project like this. Mine liability is $1,000,000 on two occasions annually. I am looking at doubling my liability premium this year.
I would take this inspection on as a commercial inspection and retaining a licensed electrician and HVAC contractor to pick up the slack.
Just my 2 cents.
Hope that helps.