keeping a dog in back garden of holiday home

we have recently taken possession of a new holiday home and now need to make it escape proof for our Trixie! we have a small back garden but it is not enclosed and wondered what is the optimal solution taking cost and ease of 'construction' into consideration - anyone any suggestions to offer?

Is the holiday home on a fixed site? If so you should consult the management as they often have rules regarding both animals and any fencing etc