Someone as in your manager or you can do whatever on your own? Depending on the product or service and your strength. Please be more specific.
all depends on what your goals are. You could do ppc advertising. Or you could pay a seo expert. WHat goal are you after? what kind of site do you want to advertise?
I'd use it to launch a niche information product business. I'd get some graphics done for a couple hundred dollars, setup a nice looking website, with some good content and an excellent sales funnel. I'd spend a few thousand on an good copy writer to write the sales message and then I would spend the rest either on SEO or PPC/CPV to get some traffic to the site and some sales.
open a few more site and promote them as well, then link to the main site. not let anyone know/see that its by the same owner, try to take control of google top 10 for that niche. at list one of them should be an nutral information center that promote the main site but do it without anyone knowing... ;-)