Move to Australia and become a tiler.
1. Move to Australia
2. Take up one of many trades (tiling, concreting, wiring, plumbing)
3. Answer your phone. Respond to emails quickly
4. Show up when you say you will, quote when you say you will
For 100K you can ignore steps 3 & 4, and you'll still have more work than you can deal with.
Seriously.
Here's a FIFO[1] position paying 80K + 9% retirement, plus it provides accommodation while you are onsite: http://www.seek.com.au/Job/mine-chef/in/perth/19143356
[1]FIFO in this context means Fly In, Fly Out. They fly you to the site for a couple of weeks, then fly you back out for a week off.
It's not a bubble when interest rates are 8% and loan conditions are amongst the strictest in the world.
It's true that prices could stagnate or even drop somewhat if unemployment started to rise. But that's a very different situation to a true housing bubble like in the US or Ireland that was driven by cheap credit and easy loans.