Big pressure tanks are no longer the preferred method of controlling pumps. Constant pressure systems have become the most popular way to control pumps. Variable Speed Pumps or VFD's have been redesigned 6 or 7 times in the last 20 years, because they still can't get all the problems solved. However, the Cycle Stop Valve is very dependable and therefore has remained unchanged, and has been replacing VFD and large pressure tanks for more than 15 years. Big pressure tanks only slow down the cycling, while a CSV eliminates cycling. The CSV delivers "constant pressure" as compared to constantly varying pressure as when controlled with a big pressure tank. Since the CSV eliminates cycling, you can use a very small pressure tank. The system pictured below works on pumps up to 25 GPM. You can install this in the garage, and tee water lines to the house, barn, irrigation, or wherever else you need water. The CSV system not only delivers constant pressure but, cost less than big tanks or VFD's, makes the pump system last longer, and saves considerable space in construction and for heating purposes. Big tanks are a thing of the past.
The size of the pipe line depends on how many GPM your pump puts out and how far the line is going. 1.25" or 1.5" lines are fairly common for house well size pumps.