would the vacuum valves of these https://www.amazon.co.uk/ANSIO%C2%AE-Set-100x80cm-Compressed-Bags-Vacuum/dp/B00SY9TBYK/ref=sr_1_6?ie=UTF8&qid=1473825948&sr=8-6&keywords=space+saver+bag
not be adapted in some way ??
has he considered fitting solar panels to his roof ?? my mate gets a nice cheque every month from the `grid` for the electricity he generates , living off the grid in town and getting paid for it :) :) win win :)