Not to mention, your life is going to be pretty miserable if you're working two jobs and spending a lot of effort on living frugal. There's just something off-putting about the thought of spending decades living frugally and working yourself to the bone so you can retire and finally have fun.
The exemplar folks who advocate doing this, a'la Mr. Money Mustache, are real pieces of work too. They tend to hide the fact that they went into the process with an inheritance to fund their their nest egg and are working nearly full time in their "retirement" as paid frugal advocates.