I want to add a few hose bibs around our property (4 acres) to help with watering trees and the garden. It would be a pretty long run of pipe, probably a total of 5-700ft. Would there be any reason this would impact water pressure in the house? We already have trouble with pressure if I run the sprinklers. I'm kind of assuming it shouldn't have an impact outside of if I had a bunch of the new bibs running.

No impact results would only come if new bibbs are supplied by a new, segregated source of water.

There's plenty of boring plumbing/Mech.Eng formulas someone else can run for you about pressure, distance, friction and hose bore size.

e.g. house design located 150 yards from street & meter box
cannot use SOP 3/4" tap & supply line, else your shower time looks like dribble time, so low the pressure
so if 3/4" tap is as big as budget allows, then supply pipe feed size must be 1.25-1.5" (not 3/4")
Just to give you a general idea

Seems like a well is in your future
or a Drip System?

Another gardening source might be KAMU "Garden Success" program = free advice
+ ask the licensed Architect that designed your home?

Thanks for the response. I have been heavily considering a well given the $400/month water bills with this drought.

We also have a second city tap on the property that I could branch off of so I may look into that instead.

I used 2" pipe for exactly what you are doing. My run was a little longer, but not much. There is no measurable loss in flow or pressure. I brought up risers everywhere I wanted them and choked the pipe down to 1" with 3/4" FULL PORT hose bibs. I think they are made by American Valve and I got them on Amazon because why in the hell do I want to go into public to buy them when they will bring them to the door.

You aren't going to like the cost of your project though. T&P for your wallet. Mine was pretty pricey when I did it and I was just coming into the upswing of the covid pricing when I figured better now then later.