second-homer       
noun [ C ] UK uk/ˌsek.əndˈhəʊ.mər/ us/ˌsek.əndˈhoʊ.mɚ/
 二套房房主
someone who owns a second home
  On the Greek mainland, the favourite area with British second-homers is the Peloponnese. 在希腊大陆,来自英国的二套房房主最喜欢的地区是伯罗奔尼撒半岛。 
 Commuters, retirees and second-homers have sent prices way beyond the reach of locals. 通勤者、退休者和二套房房主推高了房价,使其远远超出了当地人的购买能力。 
 - More examples
 - I should hate to see the village overrun by rich second homers from London.
 - Not everyone is a second-homer - one in four re-mortgages is used for home improvements.
 - The estate agency is witnessing a scramble for a two-bed cottage between a would-be second-homer and a local.