David, so you will have all that pipe which is controlled by a pressure switch in the house which creates a large storage capacity (think of the pipe as a part of your storage capacity) in the pipe and allowing the water to flow both ways from the outside pipe into the house.
Then potential line pressure loss for a few hundred feet is not too bad, but for 800-1000 feet the pressure loss may be substantial.
We have about 500' of 1" main line irrigation, and a backflow preventer valve in the house, and the pressure is about 15 PSI lower at the furthest point. But in your case, your house may be the highest point and if you have 100' of elevation change to the lowest point from the house the pressure will increase for example.
Normally "external or outside water" if its fed from the house supply has a back flow preventer and this prevents the external water from flowing back into the house but allows the pressure in the house to feed the external lines. The whole system is pressurized from the house, but can't flow back in - so when there is demand externally the pressure drops and the pump turns on.
For what you are doing and planning with a large network of piping, I think you might get your well guy or someone experienced in the area running water lines on farms or irrigation. Trust me, leaks happen, and things break, and you need to be able to isolate the different zones and so on..
Do the storage tank now, but get some pro advise for your situation before extending your water network.