I was waiting for someone to mention friction loss. The longer the hose lay the more PSI is used up in friction loss. For each 10 ft rise in the hose lay you lose 5 psi. And for every 10 ft of drop you gain 5 psi. The only way to maintain enough GPM is to increase hose size. So yes i would start with 2" for at least 500 ft, reduce it to 1 1/2" for 200 ft then 1" for 100ft. Then 3/4" to you home. Now this is a Guess on my part. If you knew the friction loss per 100' of PVC at a given ID, And the GPM flow of your pump, I could figure it out exactly.