Long, tedious and boring story cut short, one day I woke up and decided that I no longer enjoyed working in the IT sector.
(after about 20 years of putting up with the various levels of brain death involved in supporting both the machines and their (ab)users..), so jumped.
I'd gotten so sick of the whole game that after I quit my last full time IT job, swore I'd never do it again, and it was almost a year before I touched a computer of any sorts again, and about two before I went back online.
First couple of years readjusting to the (major) cut in salary were pretty nasty, saving grace was that I owned my house outright and had no outstanding debts, even so , financially were tight at times but things have sort of stabilised. Currently working for a charity as a sort of Über-handyman (plumbing,painting,electronics and hardware repair, NC machine programming etc etc - the etc etc including IT work...but for reasons explained below),
To make ends meet, I've been doing things like plumbing, woodwork (joinery mostly), painting and decorating etc, it sort of helped that I'd a family who were involved in these trades so I'd grown up knowing how to do most of it., and honestly, I've been as happy as a member of the genus sus in coprophilous materia..
A cautionary note though, once it is known that you actually know anything about IT in whatever field you jump to, be prepared for what usually happens next. I'm slowly getting dragged back into IT in my current job at the charity, mostly through the electronics related work I'm doing for them (my 'field' before I jumped to the computer/network admin side of things), but also through what I'm seeing as seriously screwed up Network/computer installations within the charity I work for (and others) which they're paying people good money to 'administer' on their behalf.
Even though you swear blind at the start that you'll never do any IT work again, it *will* find you..in my case, I don't mind as it's for a reasonable cause (and I really hate seeing people who've got Noddy MCxxxx and CCxxx bits of paper pretending to know what they're doing and taking the piss in this manner, especially with a charity).
So, be prepared for a drop in living standards based on monies etc, I can't tell you if you'll be any happier. I am, I actually sleep more than a couple of hours a night now (after years of 18-20 hour days, six days a week) and I no longer see reams of 'C' code in my bloody dreams (and I praise the flying spaghetti monster for that, as I do so hate 'C' ) but that's just me, YMMV.
One bit of advice that I can give you from my experiences jumping ship. I can't stress this enough, if you do go through with it, *plan* your exit, know what else you *can* do, and see if you could survive/make a living doing whatever you choose. Plan your exit, don't just jump ship the way I did before you have something else sorted out to go to first.. This lack of forward planning was my only mistake/regret, understandable at the time, as I was seriously pissed off and wasn't quite thinking straight, but this lack of planning probably caused me the most grief the first couple of years.
Like at least one other poster has said, in general it'll help if you have a degree of some sort as well.
and finally if you do jump, then good luck, and hope it works out for you.