I don't think your prepared in the slightest given the questions.
Costs of starting up, so how much would you need?
What do you need to live on?
Where is the work coming from?
What you going to charge?
What jobs can you realistically take on?
I haven't been trading long compared to some of the folk on here, they advised against it and it seriously isn't easy.
I get work in and times I am busy and ideally need another pair of hands and others I aint so busy.
What is your competition like, in my neck of the woods its heavy, I win some I lose some, recommendations are great, but to be recommended you need to get work in first?
What if your ill. or fall off a ladder?
What if some f'in bus hits your van and the insurance f'k you about messing up the jobs you have on, can you get what you need to tide you over and get working whilst your waiting. (happened to me before Christmas and it was a nightmare sorting things out rearranging jobs and still waiting for all the money back for the repairs, but if I waited for the insurance I probably still wouldn't be back on the road).
I have a fair bit of stock and that stuff seriously adds up, yet must individual items aren't so expensive. Theres more bad weather on the way and how bad it is going to be we will have to wait and see, but migt be wishing I had a 4 x 4 or a boat....lol