For those that have build or had a house built, questions inside

[tabstang]

also, buy plumbing fixtures on Amazon - very nice stuff for CHEAP! like this - https://www.amazon.com/gp/product/B01965XYC0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
You might want to design plumbing one piece at a time to get exactly what you want