Tradies are doing huge business. JMP: realestate is a very competitive industry, and if you don't like sales I don't think realestate is really for everybody.
Up here if you're a plasterer, floorer, or something like that you'll almost have guys knocking down your door to give you money. Same in melb, just with the growth in property and renovations being the "big thing" at the moment any associated areas are also doing big. Some are making mega mega bucks with the right areas and businesses. You might not think it, but many of the people driving around mercs and the likes are tradies.
So maybe something that combines IT with that could be the go. Wiring up network architectures in apartments and housing communitites and things has been said to be the "next big thing". Maybe that is what you could look into?