That's an interesting topic, tell him NO!
You can do it if you design your roof to accept solar panels, install a backup generator to provide the house and charge batteries at the same time in case you won't have sun for a few days, the cost will be as much as the complete house, you need inverters, BIG batteries (which need to be changed every few years). All that costs a lot of money and in case you don't consume a lot (no electric water heaters and stoves) It is doable IF you have 30-40-50 thousands. You can also introduce a wind turbine to the system and they will work all together (yeah that's extra money) .
I'm going to tell him what you've said. BUT - he's 27 years old and thinks he's done enough research and knows it all. *sigh* Thank you for the input!


My late husband was involved with developing some of the first drones while he was in the Army back in the fifties. Jeesh. He had a lot of fun with them.
Pretty much. He had them going really well until they would get on the other side of a hill or mountain and they'd lose the signal. Then they would have to go hunt 'em down. He felt like a kid playing with RC planes. He was out at Fort Huachuca, Arizona.