20 years ago people were worried about SHTF. Nothing really happened. I'm not saying you are wrong to worry about it but you are wrong if you don't consider alternative futures.
Do yourself a favor and don't focus on the fear-mongering of people like Alex Jones. There's a good chance that 20 years from now, we'll still be here bitching about the government while living our lives.
If you are 27 and living with mom and dad, you are doing it wrong. There really is nobody to blame but yourself. Prepping for a collapse should be a luxury at your age. A couple guns and ammo are good preps, then move on. Think about it. You could have invested wiser if you weren't so damn scared of what might come and you'd be better off.