If you put a core keyword in Google Adwords:
One month= 1,000 clicks X 20 TWD/clicks = $20,000 TWD/month
One year= $240,000 TWD/clicks
Your core keywords will be ranked 10th after using SEO service, and will probably save many costs by using it.
There’s no need to pay for any clicks, and worry about your advertising budget, the website stays as long as you’re focusing on optimizing your SEO.