Would They Tax My Savings If I Save too Much?

I make $2,800 a month after taxes. If I decide to live off grid and supply myself with my own electricity these will be my monthly bills from what I have worked out.

Groceries - $200
Satellite Phone & Internet $90
Car Insurance - $90
Wood/Propane $150
Gas $150

I wouldn't have a mortgage because I would build this off grid 14x14 cabin

Would they tax my saving or suspect I am making money elsewhere if I am saving $20,000 a year? Or would they acknowledge the fact I live off the grid.

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