Draftsman Brisbane North recommendations plse

We would like to raise our Qld'r house this year and put a slab down, eventually would like to build in underneath but a bit out of our price range at the moment. Our block is slightly sloping so will have to excavate a bit.

It's such a mess under our house, I've hit my hit too many times on the roof and now a stump has fallen over haha, the house is telling us it's time to do something!

We are looking for a draftsman on the Brisbane northside if possible (we're near Enoggera Barracks) and wondered if anyone could recommend one? Otherwise just one in Brissie is fine.

Any comments or tips on raising a house would be much appreciated also ie the process, how long it takes, cost, any increase in a houses value.