My SLR is Nikon d7000, Nikon 18 140 lens. What brand of tripod should I use? I heard that Weifeng is good at diaosi.

Just because you are poor, you have to buy Weifeng. Weifeng tripod is cheap. The basis for choosing a tripod is stability. How to choose a tripod? You calculate the total weight of the equipment (fuselage plus lens, or other equipment) that needs to be mounted on the tripod, and then choose a tripod that can support twice the weight of the equipment you want to mount on it. The description of each tripod has the maximum supporting weight. For example, if your body and lens add up to 1kg, then choose a tripod with a maximum supporting weight of 2kg. After the stability is guaranteed, choose the brand according to your own price budget. This is the right choice, and stability comes first.