There are heaps of online resources telling you what to look for when buying a house, and what you'll need to take to your bank to get the mortgage, and what extra costs to expect for things like lawyers etc.
What all of them has failed to mention is the hidden coffee cost. Every rushed lunchtime meeting with a lawyer, real estate agent, architect, or mobile mortgage manager is followed by a quick coffee and sandwich to debrief. So far that's cost us more than anything (except the LIM report).
I suspect there may also be a hidden alcohol cost looming once we get into said house and are unable to go out and drink.