I am an Google Adsense Specialist and among Top 3 % scorer in Google Adsense test by Freelancer.
I have experience in creating and monetizing the websites with google adsense. Since it will take a minimum of 6 months to reach your target of 20-30 $ per day and taking in to account of my expenses in creating the domain, contents and SEO activities it will be 500 $ for the cost itself and I am charging just 2 months of income for giving you an life long income earning website.
Others may bid lower and create an website for you, bu they will be clueless about the niche to choose, how to rank and make money with google adsense.
I wish you all the best in your efforts.
Thanks & Regards
Shankar