when I looked at it last, it wasn’t too much to get around ~week’s storage for myself. Some solar panels on the roof, some storage tucked into a utlity closet, in every house, you have a distributed grid.
In the USA you’re looking at a price tag probably close to $150k+ for one family’s worth for total grid independence unless you’re willing to restrict which geography you live in or make pretty drastic lifestyle reductions. That week’s worth of storage batteries is going to set you back a lot.