If you are thinking of doing this as a hobby good luck but if as a business, might be worth more thought:
You are proposing to enter one of the most competitive areas of the web with no experience and presumably without a suitable budget. This is also an area of the web which is struggling due to the economic situation.
Presumably you wish to work with major search engines, at a time they are giving less and less support to directories. That model is historic and the only way to see them hold on is by adding significant user value, preferably involve users in the site and expand the content way beyond the directory itself. Despite this, you are suggesting a limited version.
Property directories in truth are often not much use to property owners, they could spend their marketing budget in better ways. Perhaps a small site featuring their property/properties with the URL used well in ads, possibly but not too often a little search traffic, depends on how hard they work and their focus. Regardless of that, many are now wise to the directory push and not keen. You should know that the average property owner receives dozens of requests a year to list in various places by email or tele-sales.
Over the last two years, a significant number of holiday property directories have gone under, many professionaly run. Can vouch for that, although my work is basically search engine work, one of the sectors I have been involved in before this is the one you are proposing to enter. Had a few calls asking for support with these sites but wouldn't waste my time and neither should you.
Good luck with cutting your teeth on the web, a great place. Much better though to pick an area where you can add excellence, enthrall people and when you have achieved this, then monetise the situation. Focusing on a niche also gives you time to learn how to work with search, your users and your site. That isn't going to happen for anyone under a year or two, then they have the chance to spread their wings if they wish.