Living off the grid we did so for the entire eight years that we had our sailboat Shadowtime.
Here you can see the wind generator, there were two 75 W solar panels on top of the Bimini... The canvas that covered the cockpit. This covered 95% of our electrical needs... With today's technology you can make 100% of the electrical power that you need... Solar panels are much more efficient than they were several years ago.
We had a water maker aboard.
We used single side band radios, and UHF radios for communication.
The sewer was provided by the waves, currents and tides.
We did our cooking with two 5 gallon propane tanks.
We were totally self-sufficient from utility costs... This is a very easy to do on land as well.
Let's review how we covered the five components of utilities while on the boat.
Today there are many ways to be self sufficient.
Almost any place you would choose to live a well, a septic tank, cell phones and propane are readily available.
As far as electricity you can make your own solar panels and wind generators...
Recently I met a 60 plus year old cowgirl living on a small ranch by herself in eastern AZ...she cooks on a wood stove, gets her water from rainwater she collects from her roof, and is living very happily and cheaply. She is quite content, pays cash for everything she needs and smirks at the mention of a utility bill...good for her.