Why must renovation always be over budget?

Aiyaaa!!....again, its over already. When I start spending money in house renovation it will gone off the money chart. This goes find for they who gets a LOTs and save it. But for them who is trying to keep it under their nose here a few tips:-

1) Draw our plan.
2) Draw your final look. Etc: Kitchen Cabinet, Tiles, Decoration or Lighting.
3) Present it to your contractor and wait for his qoute.
4) Prepare for an extra 10K at least.
5) and Don't Monitor your house on a daily basis.

InsyaAllah.