Ethanol for fuel is a free permit from the ATF
They want to know where and what.
Still is relatively simple to build and making it out of straight sugar is the easiest. Takes appx 12 hour to make a nice clean 5 gals 150 proof that runs well in an engine, however.....
Do not add gas, the water in the ethanol will separate and create a wonderful creamy goo
Bump up the jets in the carb considerably
The type of still you would want is a Reflux still, and can be readily purchased with the serial number for the ATF.
and when you get done drinking some of that stuff, you will come to hate it. No hangovers though
As for the run time, if you build the right reflux setup, you can hit a gal an hour at 180+. Also, if you want to mix with gas(effectively), you have to get it over 190 proof, but you can dry it with zeolytes. Cost per gall about 4 bucks