hypothetically of course. Lets say you have $50 you want to spend on the optimization of your site. What would you do, and why?
Hire a part time SEO to do a seo critique of your website and the charges will be paid for one hour of consultant work. Then implement the recommendations yourself to save the costs. That is my idea.
Just create some back links with this budget.. hopefully some good PR site will give you link back with anchor text