Don't let people's comments discourage you too much (they were a bit on the pessimistic side). The key to having such a business is A) Having one heck of a website, and B) Having this website positioned well in Google via SEO and SEM. If you've got those two, your apartments will rent. If you can rent people's apartments quickly and keep them full, then guess what? People will pay for your service (although you might want to be a bit more competitive than 20% as that figure sounds absurd to me). If you can provide competitive rates and an attractive appearance, then you could probably launch this business. The key is the Internet. Ignore it at your own peril. The thing is that in Argentina, most businesses haven't taken advantage of the full power of SEO and SEM, so if you find a business that is very good with SEO and SEM and can do a good job with your site, then everyone will beg to be on your site since only a few of those businesses here are taking advantage of SEO/SEM. That's the way I see it. Whenever I look for a temporary apartment, it seems like there are just a few sites that actually show up. If you would like free advice, about SEO/SEM, feel free to send me a message.