2. What to choose ?

Now, as with anything in life you can go all in to the max, go the minimum or go somewhere in between with how advanced, redundant, safe and reliable your network will be. Most often Home labbers choose for some middle ground ;) Now, everyone is used that the internet in one's home comes from one device called a router. Then you simply connect wireless to your device and you are connected and that's all. 

But if you are reading this you wan to help he world towards a global digital commons. In that sense you should replace your old ISP router wih th a ore advaned