Dear Dave:
--As gamblers are wont to say "Go big, or don't go at all". Have you considered buying a property with multiple garage/shop/storage/retail units. We have a lot of this sort of thing very near me, here in East Orlando and they stay rented. A very good play is retail workshop (automotive, plumbing, AC etc.) in the front with rental shop units in the back. In the midst of the great recession, business rental units rent better than ever. I am sure you must have that sort of thing in Sydney. You are a going concern, and you have some capital. I see no reason why the banks would not at least give you a look. Between you and the Mrs. you should be able to manage the thing if it is not too large, say 3 to 10 units, and be well rewarded for your time.
--I have several friends who have shops in a industrial rental shop complex, and they build a small office room inside and HVAC it only to save energy. A couple of these friends even (don't tell) even live in the office to save money while they are building the business. I am going to be out of my residence for several months, while a complete rehab is done, and I may well just rent and (don't tell) live in one of these, being a bachelor.
"I do believe it is the first time in history that fire has ever melted steel."
Rosie O'Donnell
1962 -
Best Regards
Clear Ether