In order to add your property, there are two ways

1º Pay the amount of 60 euros per year

2º Get a free advertise if your personal web site has a pagerank 3 or more

The html code is:

<p><a href="http://www.solalquiler.com/">Alquiler para vacaciones</a>.
<a target="_blank" href="http://www.playacostaluz.com/">Alquiler en Huelva y
Cadiz</a></p>  

If you prefer, add a image like this: