Harmo,
Always nice to welcome a fellow Aussie to the forum. I'm in Tasmania so it may be a while before we can meet up for a

You've inherited quite a collection of goodies there and should be able to build a very capable machine. There is a picture and video of one of Jazcnc's upright machines around here somewhere.

My only sugestion, other than to second Andy's advice, would be to consider a steel frame if your budget is tight. Aluminium costs an arm and a leg in Australia whereas steel is something we dig out of the ground in vast quantities. It's more work to get accurate but you'll find examples of steel frames using epoxy levelling on the forum. Worth a look, especially if you already have access to a welder.

Kit