Luminaire,
I agree with all the above. Make your cash work hard for you though, don't go spending on expensive luxuries like new vans, top of the range tools and equipment. Get yourself sorted with mid range quality tools etc until you get established then upgrade as money allows.
Do a search on here, it has been covered well, and you only need to spend a couple of hundred quid on power and hand tools to have enough to get you by to start out. Buy some test kit secondhand, you will save a fortune, have a look on the post "which is the best tester and why" its sticky somewhere at the top of one of the sections.
Get a bit of stock, £100 at screwfix will get you all the basics, sockets and switches etc, and get a bit of cable as well.
Cheers..........Howard