Make sure there is a clear and obvious way for people to get in touch with you wherever they are on your website. Failure to do so could result in lots of potential bookings finding their way to somebody elses website.
Have you seen the number of results that get returned when you search for "holiday rental property in brittany" or "loire holiday rental" or "gite near la baule" or any other phrase that includes a combination of "france", "brittany", "holiday" or "property"? How does your site stand a chance of getting a decent ranking and therefore being noticed? Link building is one activity that could improve your ranking.
Remember! Yours isn’t the only holiday property in the area, and it won’t be the only property seen by search engine visitors looking for their ideal holiday retreat. So it needs to stand out from the crowd and it needs to do so from the moment the visitor arrives on your site.