The first and most important is to clearly indicate your financial capabilities and to roughly distribute money and subsequent costs in the mind, comparing them if possible. The next step is the purchase of building materials. It is very important to purchase building and finishing materials in a reliable place, for example, in a large construction supermarket or in a well -known construction market, in order to avoid poor -quality products. However, you need to know the measure in everything, so do not overpay very big money for a beautiful store sign or for a well -known brand.