>checks flag
Oh no. Did the ban on Spergook expire?
First of all: Sure you can get a machine gun in every wndow, and probably also a trench network with mines and even automated turrets. Hell, you can geta tank, a mortar and possibly even a mini nuke in your basement if you really wanted to. But what would that cost? How much can you even spend?
Even if you can afford all that, so what? Go to sleep for an hour and someone will just cut power to your house while you are asleep. Even if you have an emergency generator in your basement and fuel/food for the next year, once that runs out, you will starve or freeze to deathe depending on where you live.
You are practically boxing yourself into a siege situation, where the ones with the longer breath will inevitably be the ones besieging you, since they can get supplies and you can't. If you manage to figure out a way to get a self sustaining nutrition system working in your cellar you can call the Swedes for your Nobel prize.
If you want to defend your home against an army, you will need comrades, an army for yourself and the means to feed and supply them. You need land and people to work that land, and possibly pay taxes too so you can pay your soldier and the workers in your factories.
In short, you need a nation to fight back against a nation in a traditional battle.
If you want to be successfull, give up the comfort of your home, live in the wilderness (or conceal yourself among the normap population) and wage an insugency.
Or you could just join the existing armed forces, defend your home from invasion by being in the army, by working in a factory, or by being an engineer ,by writing propaganda to get other to join, by teaching others how to be a better man, and