Grab it by the balls and go for it….IF….you are confident that you have a valid business model.
Your boss is laughing his way to the bank every month, keep that mental picture when you realise the debt has been long paid.
Don’t give him a hint, get everything setup-and then go live overnight.
take on a couple of jobs as a taster before setting up business properly.
If you can do this without him knowing this is a really good way of ensuring you are 100% setup and ready.
Take your contacts with you (this is legal), make sure you contact existing contacts personally and explain how you (the person they pay to deal with) can now be contacted.
Life is short, if you are confident then do it!