The cost of building an organic fertilizer plant varies due to various factors, including equipment costs, land rent costs, factory construction costs, raw material and auxiliary material costs, labor costs, etc.

Firstly, in terms of equipment costs, it mainly includes the costs of slot type flipping machines, silos, material crushers, drum screening machines, horizontal mixers, belt conveyors, packaging machines, and other equipment, totaling approximately 150000 yuan. In addition, equipment costs may vary depending on the yield, particle shape, equipment configuration level, and type of fertilizer produced on the organic fertilizer production line.

Secondly, the cost of land rent depends on the location and region of the selected factory site. The selection of factory site usually takes into account factors such as raw material site, terrain, water and power supply, as well as transportation convenience. Generally speaking, organic fertilizer plants are built in rural areas with relatively low land rent, but the specific cost still depends on the local situation.

Furthermore, the construction cost of the factory includes the construction costs of the factory building, employee living area, equipment storage area, raw material warehouse, fermentation workshop, semi-finished product storage area, processing workshop, finished product warehouse, etc. A 5000 ton organic fertilizer production line requires approximately 700 square meters of fermentation plant, 500 square meters of processing plant, 400 square meters of warehouse and office space, with a total construction cost of approximately 400000 yuan. However, the required site area and construction cost for organic fertilizer plants of different scales may also vary.

Finally, the cost of raw materials and labor is also an important factor to consider when building an organic fertilizer plant. The raw materials are generally poultry and livestock manure, and the auxiliary materials are straw, garden waste, etc. If it is necessary to purchase raw materials, the cost of raw materials and accessories should be controlled below 100 yuan/ton as much as possible. The labor cost is related to the selected equipment, process, and local wage level.

Therefore, considering the above costs comprehensively, the overall cost of building an organic fertilizer plant may be very high. It should be noted that the information provided here is a rough estimate, and the actual investment amount may be adjusted according to specific circumstances. It is recommended to conduct detailed market research and budget planning before making an investment decision to ensure the rationality and feasibility of the investment. At the same time, it is also possible to seek the help of professional investment advisors or industry experts to obtain more accurate investment advice and solutions.