If you are planning to build a rest house this summer, this design could be a good idea. I saw it from the resort that we have visited recently and I like it's concept of having a cottage underneath complete with sink and a BBQ grill. Upstairs is a room with own toilet and bath. It's a space saver and very simple. Eighty percent of materials used is concrete cement. You can even make it look more airy and refreshing by having plenty of ornamental plants around the cottage.