It's hard to say, it depends on the materials he uses and whether his workmanship is lean. Sometimes it's cheap, but the project sucks and isn't worth it. You can negotiate with him to pay some money in advance. The project is really good, and 7000 yuan is worth it. If not, he will definitely say no to him in advance. For example, depending on your negotiation level, you can contact more contractors and let them compete on their own.