Consider the long term practically and maintenance of patio materials carefully....Most people only think about materials in terms of the cost but that should not be your only consideration. You don't always require the cheapest patio material. On the contrary, you also need to think about what patio materials are going to last for a long time and what kind of maintenance each type of material needs.
The choice of screening will depend on available budget. Walls are expensive to build, wooden screens with posts and trellis panels are much cheaper. Planting a hedge is usually the cheapest option, but may take a while to grow in unless you can afford large plants or an instant hedge.
Cheaper Indian Sandstone is not always the bargain it appears as it is thinner, or poorer quality and more porous causing leaching of the minerals in the mortar onto the top surface of the stone. There are some inexpensive granite slabs currently available that make a wonderful surface only slightly more expensive than Indian Sandstone. The more expensive options are Travertine, York stone, Basalt, and Marble.
Choosing the surface material : The most common surface for a patio are paving slabs. There are many different types of paving slab with a wide range of price tags. Steer clear of concrete slabs - they are often more expensive than natural stone, will fade over time and always end up looking fake. Indian Sandstone has dominated the paving slab market for years as it is cheap, natural, widely available and looks good.