I talked to Hal today about PEX tubing, he said 1/2 inch will be fine, however… He said PEX tubes need a crimp tool, looked it up and they’re expensive ($60 HD) We may be able to rent one, I’ll need to research that. We can set up all the connections first, then rent the tool. That means all the plumbing, water heater and pump need to be in place before we get the crimp tool. The sink faucets can be installed with the flex tube/valves we have. Hot water needs tolerable fittings, copper, PEX or something else I don’t know, more research required. Those mags you brought may know. I’ll need to make a drawing of the water system, figure it out.
Meanwhile, we need the floor to be flush, smooth for linoleum. That’s next.