Buy a farm, preferably one with enough forest to keep the place warm and build a barn or 2. Start small by growing something or other for your own use while building or renovating the run-down house on the property. Maybe you can help out on a neighbouring farm, say that one where the farmer nearly cut off his hand due to a bit of stupidity with a large angled grinder without a protective cover. Keep at it, get some animals if you want, maybe some sheep, maybe a few cows. Your wife and children are probably going to get some horses so be prepared for that eventuality , you'll end up building not one but several stables, shelters, feeders and more of such. Once you've been doing this for a number of years you'll have a good grasp of what you could do to improve life on the farm so you start developing hard- and software to make things happen. A wood-gas powered CHP system might be a good start? That way those farmers who heat their house and water (for cleaning the stables, milking equipment, etc - lots of hot water...) using wood chips get both heat and electricity for the same amount of fuel, all the long Swedish winter long. Those PV panels don't do that much when the sun hardly shows itself after all...
This is where I am now, more or less.