our pockets are getting empty

Well it's been a while since I last posted but we are waiting for parts right now.
We got the new toilet from VTS it's a sealand travel lite high toilet. Looks very well made. We tried to use the old floor flange but the threads that go into the black tank were rusted off. So we ordered a new one from VTS (it's on backorder) We looked for a threaded flange everywhere but only found that sealand makes them. We tried to make the old thetford valve work but it was broken and not usable so we got a nice new one of those too. We are lucky that the y type piece that connects to the valve is in good shape and we can re use that. we also had to order a curved thetford part that attaches to the hose. So once we get the floor flange we will have to cut a hole in the floor, cut holes in the new black tank and fiberglass the fittings into it. then we have to get the tank installed under the floor. install the toilet and replace the plumbing in the bathroom. We are not sure weather we want to redo the copper or go with pex. The rest of the trailer still has copper. We also will need to rebuild the galvanized box that goes under the black tank. Wondering if another material could be used as the galvanized turned to dust. We also still have the kitchen in pieces right now too. Oh and did I mention we are getting ready to order dexter axles. I just want to make sure we get all the info and measurements right so we order how we should.