How much can the bathroom and kitchen use the cheapest LV gusset plate and a slightly better pvc gusset plate as the ceiling?

I beg you, you must use the aluminum gusset plate. It doesn't matter if it is thinner. On the surface, the price of aluminum gusset plate is a little more expensive, but in fact, with the keel and corner money, the price difference is not too much, and the most important thing is that you can dismantle the aluminum gusset plate yourself, and it is difficult for you to dismantle PVC, so the lowest price for factory door-to-door service is 80 (Beijing price).