The only thing I seen on any of your pics that is wrong is where they used cut bricks under the windows, to me this shows the bricklayer was useless…

To be honest that slab doesn't look right to that drawing, because part of that sand should be a hallway to your front door beside bedroom 1 and the garage.…

I can't believe anyone would fixed moldings and painted that the way it is, that's not a mistake, that's more I don't give a toss.

I'd be more worried scratching up your nice floors than the walls which would be an easy repair with a bit of spackle, you might want to tape up along…

Dude don't reply to my post go away, as if I haven't worked with owner builder who had nothing, in fact most people who work in the building industry don't…

A white card a one day "course", if you can call it that because you can't fail and is far from that crap that you posted before.
Dude I did three…

You don't need to do any course, you just need a permit. Can you show me where it states you need to be trained to be an owner builder on…

Many air cons barely cope with higher temps, batts won't do much as in you won't get twice the benefit from twice the price..

I've never heard of such a course and you don't need any qualifications to owner build.

As a carpenter I'd use it as a house frame and looks as if it wouldn't take much to get it up to code, most people here know little about…

To be honest the money difference indicates you should go with the better, but I really can't see it making much of a difference. In Sydney when we had days…

I doubt there is such a list but you might want to buy yourself a book like "The Australian House Building Manual Book" by Allan Staines.
I don't own this…

I've never heard of such a thing but there's no doubt if the temporary stairs are set in place it's going to save you money.
Ask yourself if you had to…