blank foam and shaping question

Hi guys,
I read some things about shaping your own surfboard, and i was quite interested in it...
Did some surfing on the internet and found some general information about shaping but i still had some questions and couldn't find the answers on this forum either.
Shaping first board (using the basic tools), how much does it cost approx.?
And I didn't quite get the types of blank foams... Found some things about rough foams and on preshaped ones. But when i look on the websites to buy blank foams, all of them already have a surf-type shape! Where exactely does the shaping happens then? Are there foams that are shaped like a long box (with a stringer in it...) that you have to shape all by yourself and where do you get them? See where i'm going?
To make a long story short: can you tell me something about blank foams and cost price of making new board?
Also, how long does it take to make a board?
Thanks in advance!
Mathieu
I read some things about shaping your own surfboard, and i was quite interested in it...
Did some surfing on the internet and found some general information about shaping but i still had some questions and couldn't find the answers on this forum either.
Shaping first board (using the basic tools), how much does it cost approx.?
And I didn't quite get the types of blank foams... Found some things about rough foams and on preshaped ones. But when i look on the websites to buy blank foams, all of them already have a surf-type shape! Where exactely does the shaping happens then? Are there foams that are shaped like a long box (with a stringer in it...) that you have to shape all by yourself and where do you get them? See where i'm going?
To make a long story short: can you tell me something about blank foams and cost price of making new board?
Also, how long does it take to make a board?
Thanks in advance!
Mathieu