Had this exact conversation with my sister last month when she was considering converting their old farmhouse. Here's what I've learned from my own setup in a van and what she's grappling with now:
It absolutely can work, but it's not a one-size-fits-all situation.
The sustainability angle depends massively on your definition. If you mean environmental impact, then yes—our Victron system paired with solar means we're producing nearly everything we use. Water's harvested, waste is minimal. That's genuinely sustainable.
But if you're talking financial sustainability with a growing family? That requires serious planning. School runs, medical appointments, unexpected costs—the off-grid lifestyle has hidden expenses that catch people out. My sister's worried about resale value too, which is fair.
What actually makes it work for families seems to be:
- A solid backup plan (grid connection, generator, savings buffer)
- Realistic expectations about comfort levels and convenience
- Proper system sizing—undersizing is what kills most projects
- Community nearby for parts, repairs, expertise
I know families thriving on it, and I know families who've quietly reconnected to the grid. The difference usually comes down to whether they were genuinely committed or just chasing an idea.
What's driving your question? Are you looking at permanent settlement, or more emergency resilience for a property you already own? That changes the approach entirely. Happy to swap notes on what actually works versus what sounds good in theory.