Does anybody else have an interest in building a sustainable house?  

Continue your research by living for a spell in such a house and such a community and see if you can fit in before committing yourself to a construction project.

Make sure you have enough land to build on as very few of those types of construction will allow you to build above a single storey without reinforcement or a strong frame.

I found that the smell of tyres is not too bad but other people don't like it.

Composting loos take a bit of getting used to and you need a strong stomach when it comes to emptying them and spreading it on the land. Would you then use gloves while working the soil and human compost mix for planting and harvesting crops?

Are you happy living with the drone of a wind turbine and the flickering light as the sun shines through the blades? Some people can come to live with it but it drives others mad.

I think city dwellers will find it a hard life.