Discussing your plumbing & vessel planning with an engineer & other certified professionals is absolutely a key step, before you even start making purchases of equipment.
That should definitely be part of the process of making a business plan.
You will want to know what you're getting into, before you get into it.
Some breweries find that they have to tear up entire floors of their buildings & re-route/re-pour, just due to inadequate plumbing or poor drainage.
Learn from the mistakes that others have made.
It's much cheaper to read the horror stories & anticipate struggles than it is to disassemble a poor design & rework it.
I'm a mechanical drafter/designer, by trade & see rework on a regular basis.
A lot of this rework could have been avoided, if everyone was:
1) Forthcoming with information
2) Patient enough to fully think designs through
3) Taking everything one step at a time, rather that throwing pieces together, randomly
4) Able to effectively communicate their needs
It is vital that everyone in the process has an understanding of needs, expectations & what will/won't/can/can't be done.
I was once told: "Never open a business in a hurry".