Since the brother is accepting a welding job, he wants to invest in buying materials, equipment and tools for welding. Since he is still saving money for him to buy the materials, equipment and tools he needs, he is renting equipment from someone he knows every time he has welding job. The equipment that the brother wants to buy first is a welding machine. The brother wants to take the opportunity to shop when there is a welding equipment for sale. It is good to shop indeed when the items are on sale because you can buy the items at a lesser price. This is what I do every time I want to shop something for myself.