Hi WAT5Y,
Totally off topic, but do you happen to pass the Castle Gallery in the town centre? If so, has he got anything good in the window? Asking that is making me hungry thinking of the sandwiches in Daltons. Had the pleasure of working at NIFRS HQ on many occasions, used to take a leisurely stroll down to Daltons, past the Castle Gallery. Got into a few Irish artists courtesy of Andy... Lorna Miller, Colin Flack, and Dennis Orme Shaw.
Anyhow back on topic, your reasons... same carp different day, making other people money. Two prime reasons I quit a well paid job for the uncertainty of self-employment. Just make sure you have plenty of savings on hand as
@Richard Burns has already said. If all your kit is provided by your current employer, set-up can be an expensive business when you factor in all the equipment and tools you need. Insurance could also sting, especially if (as is likely) you're an unknown risk. Just remember to factor in all the expenses and stuff, like company formation if you go limited and accountants etc., and if you end up using your car to start with, make sure your insurance covers you for business use.
I've been trading for just over 6 months, do I worry about money, yes because the business isn't making enough yet to pay me regularly, it's still buying tools and such like, but I am getting some of my setup expenses back. Whilst money does worry me, I don't dread getting up in the morning and going to work and that for me is golden. In the mean time, start making contacts with fellow tradies. I had no contacts when I started, but my effort to make them is now starting to pay off as I'm starting to get referrals from them (making sure I push work their way as well).
If you're sure and you've got the support of family and friends, get some cash behind you and go for it. Or if you're not sure, what about a change of job? See if there is a local contractor who'll take you on? A change of scenery may be all you need. Whilst being your own boss is great, I think everyone would agree, you can pretty much guarantee you'll end up working longer hours once you factor in all the paperwork etc.
Good luck with whatever you decide