How would or does that work?
It would be worse because they'll only give you a 60% lvr on the loan and expect you to cover council and subdivision costs.
Can you talk to a different lender in a different branch of the CBA. Mortgage Insurers don't tend to split hairs on these types of things and theres a couple they can pick from.
I have never heard of a 12 hectare rule before. More recently they have just been ruling out postcodes they will lend in, maybe thats the reason.
Talk to a good mortgage broker, they may have other lenders you haven't thought about that are more flexible with the loan, such as your superannuation supplier.
There is a lot of different ways of filling out a mortgage application and sometimes the way you or I might do it is not the same way a broker would recommend and the difference can be a loan or no loan. Give one ago.
Regards