Low GPA grad school post

Hello everyone
I’m sure this has been posted 10k times.

I have a low GPA something of a 2.5. the community college I attended wasted my grade forgiveness on prep classes. I’m in my late 30’s I worked as an accomplished combination welder before going back to school for Mech Eng.

 I had to start at prep math 1. During my time in undergrad, I had a lot of panic attacks resulting from my career that involved being employed by a lot of degenerates. Also paying on my widowed mother's house and raising a nephew who's junkie parents were in and out of jail. 

It was not uncommon in a corporate enviroment in the power industry for half the employees to be on Meth or cook meth at work as well as to turn company Christmas parties into drug fueled orgies. 

With that being said, I later learned my work experience was not in the ordinary and I had gotten over much of the shock or anxiety involved. I started feeling much much better about my career choice after graduation.

Since I had started out in my industry pushing tool boxes, I would like to finish a masters someday in Engineering.
But having crashed my GPA I don’t see this as possible, unless it is a pay to play online school or private ect.

Has anyone here had similar experiences with grad school ?