Wow. I'd rather go on fucking Shark Tank. If someone is willing to take $5,000 to do the heavy lifting up front (therein taking most of the risk) for only 50% equity, their idea is either terrible or they aren't committed to seeing it through.
What risk? $5000 to cover yourself + $3000 marketing along with a (free) guy to do that for you which is a huge advantage that every person "launching" via a "Show HN:" submission could benefit from. If it turns out to be a crap idea you lose 50% of a crap idea. If it turns out to be a great idea you gain 50% of a business.
Employment - Low Risk, Low Returns
Startup - High Risk, High Returns
I love how this preposition is somewhere in the middle.