Respected Sir, I have gone through your requirements. At first I would like to introduce myself. I have 4 years experience in not only SEO field, rather total Digital Marketing field.
Now, let me explain your question.
1. Sir, I can do a lot of backlinks in an hour. But, I would like to say you one thing here. Nowadays, after having released Penguin 2.1 and Hummingbird algorithm, main concern is quality link, not quantity link. And, Sir, to do a quality link, it needs time. Because, to do a quality link, it needs marketing and conversation with others. As an example, I can say about Guest Blog. To do a guest blog backlink, every one needs to contact to the other theme related site and would have to convince others. This is really time consuming but qualitative. 1 theme related guest blog link is equal to 100 normal directory.
Now. let me explain what backlink I'll do for your site.
• Competitor Backlink Analysis
• Directory Submission
• Guest Blog
• Business Directory Listing
• Article Submission
• Forum Postings
• Classifieds Postings
• Social Bookmarking
• Document Sharing
• Learning Tutorial Sharing
• Video Sharing
• Slideshow Sharing
• Info graphics Sharing
etc.
2. Now, let me explain second question. One thing I must assure you that is ranking. But, how many days needed, it depends on keywords. If keyword is strong, it needs some time, if keyword is easy, ranking must come within max 1 month.
But, I must assure you about ranking as I always follow Google guideline