I used this calculator
Calculator: Pressure Loss through Piping for Water | TLV
I searched online for someone who may have did it b4 but couldnt find any one . And wasnt sure if it would work like i was thinkin or not.
Im guessin that most of the time during the day i wouldnt have as much of a drop . Until someone turned on both faucets flushed the toilet and was runnin bath water . Then i may would loose the water pressure .I mainly wasnt sure if id have a massive water drop.
I ran a water hose with a washin machine hose to the faucet it gave ok pressure but toilet wouldnt fill up until i turned off all the faucets inside the house.