You'd spend $500 on SEO and $4k on PPC? It should be the other way around if you are looking for long-term ROI. I would spend $500 getting a simple site front page designed, which I could easily use to build out the other pages on my site. The other $4500 I would invest in buying links, getting content written, paying for Press Releases, social media optimization, etc.
Find a good affiliate program, build a good landing page/web site. Put the money into buying content & PPC. start off small and expieriement. Find a working system, increase investment monthly till I find an optimal ROI%. Save money, repeat.
I didn't think about buying advertising/traffic, that's not a bad idea. Or even starting a new site and buying back links. I do all of the designs and programming myself, so I don't need to pay anyone for that kind of thing. Thanks for the ideas guys, given me a lot to think about!
i would invest quit sum on google and rest for some new blog or directory , and offcourse if i found someone very needy will donate some.