Ha, yeah, a bike wouldn't be too good now would it lol
For numbers though, I guess the course is around the £1500 mark, a car or van can be anywhere from £800 £1000 for a decent one to get you going and there was a thread on here a little while back about starting out tools needed, and the rough average was about £400 to £500 for all the tools you would need from the get go.
Then it all depends on how much you want to spend on advertising, which can be low cost and effective if done right, or high cost and crap lol, if not.
Good luck with whatever you decide
