[johnrgrace]

Not bad, but you've got a two sided marketplace you need both people with stuff to rent and people who need to rent stuff.

I'd start with a metro area and get ahold of existing rental places and get their inventories listed to break the chicken/egg issue you face.

Rgarcia makes a great point, you should think about focusing on a specific vertical as it will make it easier to get both sides of the market jumpstarted.