Answer:
You can start building a Tesla generator for less than 100 dollars, if you're looking to start simple. All you need is 4 Germanium diodes, 2 100 microF volt electrolytic capacitors, and 0.2 microF volt ceramic capacitors. It's safe and eco friendly, too!
There is an abundance of information on the internet that can guide you in building your own Tesla generator. The work you put in to building one will pay off when you are able to produce your own energy.