Thank you for your replies.
Unfortunatelly I can only afford economy because I just don't have enough miles.
I thought 180k for economy is a good RTW deal because most flights between regions are 40k-60k miles and I would have to pay YQ anyways?
How do you suggest I proceed with planning and booking this ticket? Let's say I want do to Europe-Dubai-SE Asia-Sydney-South America-South Africa-Europe, what would be a good place to start? Also how do I see the number of miles required for United and other partners, something that I can't see on M&M website?