Had a client that had the exact same problem. We built them basically an "eBay for rentals" platform. They had a solid business plan and plenty of smarts on how

Had a client that had the exact same problem. We built them basically an "eBay for rentals" platform. They had a solid business plan and plenty of smarts on how to build it out. However, when it came down to marketing and filling up the site, their guy on the team with that job failed miserably. As a result, they were a non-starter and tanked horribly. Just goes to show: cashflow is king. Concentrate on that first, otherwise you've got to get really luck (like Twitter) and get investments without having solid plans in that area.