All you need is a water purifier. Methanol (poison) becomes gas at (something like I cant remember) 88 degrees, ethanol 89 and water 100. So when it goes through distillation, get rid of the first bit and keep the rest.
Entire setup can cost a few hundred though.
I infused it with anything. I made Schnapps and my own version of Jagermeister.. Surprisingly well haha.