I want to use pi-hole and it comes highly recommended to use raspberry pi to cover the house and have an always on capability. I started looking at just starter packages at Amazon and they don't come with a monitor, which it looks like you need. How do I do this? I want a raspberry pi to run pi-hole to protect my house.

Edit: Thank you all so much for the tips and all the different ways to get this up and going , I am officially on my pi-hole journey!