As far as paying for ISP... that's a tough one because if you both live at home, the AS is using the ISP to come HERE and get support... its kind of a double edged sword there to take that away. If its possible to cut out paying for ISP and phone then ... I dunno.. I would have to think about it...
The detachment in Ghandi really is about isolating yourself from yoru spouse... which would include financial obligations. If you CAN isolate to that level that sure.