I understand entirely. Being heavily involved in another forum, it happens all too regularly... also the same Q repeated ad nauseam.
I have also run a business for 35 years and have had my fair share of “customers” asking lots of q’s and then, armed with the info, going elsewhere with the spec, ‘cos it’s cheaper. Or those that let you spend three days on job then complain ‘cos “my mate could have done that quicker and cheaper”. Or indeed having to spend three days on a one day job to fix the customers cock up!
These fora are to help peeps, and I will continue to ask advice, and I don’t mind if the answer is “ it’s not as simple as that - yu need to sort out flow rates/pressure drop/ run lengths - please call in a qualified plumber.” That’s why I ask the “Professionals”