Research and buy 50 articles. 200$
Submit site to top 40 RSS directories 0$.
Publish 40 articles other 10 publish every 2-3 days one 0$
Hire Sturat for article promotions 35$
Pay Social Bookmarking in different time periods 20$
Take PR package promotion 80$.
Buy Directory Submissions 2000 dirs 20$
After a month pay again Social Bookmarking for deep links 20$
Invest some ammount of money in getting relevant backlinks.
If more money left then probably I would buy more content and invest more in backlinks and SEO.
If you researched well your article topics, your site should get nice ammount of visitors.
You can later make unique design, once your site start working.
p.s. Your niche is very competitive. I doubt that 500$ can make some big difference.
How about linking to the services, that are offered at the prices quoted? Top dollar post!