The major difficulty with this as a "complete" solution in the UK is that it's a small island! The only solution is to build "up" to accomodate it's increasing inhabitants. No country is successful by having a
declining population, indeed the most successful and notable up and coming nations (China / India) all have huge populations.
In a nutshell a great money-saving, environmental and personal solution for a handful of people, but not for everyone!