hmm $50 a month is a bit low I suppose? A real SEO expert will charge you by the hour, and by the hundreds
You should up the budget when looking to outsource, otherwise learn the skill yourself, it always good to broaden your knowledge on something. SEO is pretty simple. Do it right, and Google will like you, try to trick and it will get back at you. Just do the right thing and everything will fall into place.
WHT is a good place for link building, have your sig link back to your website. That is a precious link.