I'm not sure, I'll have to read back in his blog but I thought he spent more than that, think it's in one of the comments he explains it rather than a blog entry. This is what Amatay, who knows him quite well, wrote in his blog:
"You have to hand it to Ed, although he gets alot of criticism in the comments on his blog he's just brought a 3 bedroom house for £250k in which he's paid for over half of it outright. Fair [censored] play. He's 19 yrs old FFS! How many fish can say that??? "
http://amatay.blogspot.com/2007_07_01_archive.html