Thanks for these suggestions.

Australia: I've been watching a BBC series on Brits moving to
Australia and most of them were impressed enough to move there.
No doubt it would be cheaper to live there than here or the UK. Certainly
on my list of options, though I'd probably have problems
getting a work permit if I decided to stay there for a longer time.

Canada: know absolutely nothing about the country. I always imagined it as being cold.
Any particular towns, cities?

Mexico: I didn't expect this. Again, know very little of the country.
I could probably bluff my way in Spanish. I'd imagine it would be cheap. Any particular part?