If the roads have more cars on them, they’ll break faster and cost more effort to fix. Ideally, we’d build rails out to your farm and send a train to pick up the food you make.

Now the problem with your gas and electricity logic is you’re talking like the countryside is one place. Like the power and gas are made right next to your farm and you can just plug into it with a 100m cable. And since you mention it, I think an off-grid solar setup would be a great idea for your farm. That’s one less line needed. Now you just need to get water for your crops from elsewhere. I figure you’re not gonna want to use well water, because if there were enough water under your farm to feed the crops, you wouldn’t need irrigation.

But if we’re talking about 300 people’s houses, we can do better than a 300 off-grid solar setups. We can build an economy of scale. We can diversify between solar and wind turbines to reduce the battery requirement. We can build a nuclear plant. We can build row houses that share some nice thick walls, to prevent air conditioning energy loss to the environment. We can run trams instead of electric cars and waste far less energy moving metal vehicles around. We can take up less land than 300 times your farmhouse and amenities do.