Hot take, but your local community matters infinitely more than the construction of your house. Build somewhere you have neighbors yoh get along with who will stick their neck out for you.
That being said, you can do the following:
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Plant/build near large trees to cover from satellite/aerial photography
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run conduit throughout so you don’t have to rely on wireless networking
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install security cameras that feed somewhere local (I’m assuming nobody who breaks into your house gives enough of a shit to fins and destroy your recordings)
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buy actually good locks, doors, and doorframes. Make sure you’re aware of what to expect from these, they wont actually keep someone out, they just make entrance louder and slightly more cumbersome.
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build a secret sex room for you and your spouse. This is less of a privacy asset, and more just a fun thing to do.
I’m very surprised the top answer isn’t pocketbook. Their entire business model is reworking Chinese e ink tablets to make them GDPR compliant and privacy respecting. I’d recommend the pocketbook verse pro if you want a lit screen and USB C, but they have a cheaper model without those features.
Here is a good spec comparison table for ereaders in general. I’d point out basically all e-readers have great battery life.
https://ewritable.net/comparison-tables/comparison-table/