Follow-up to this question: How many acres for a 1.2K yard range? Assuming proper backstop (hill/mountain/50ft berm) and rural with no regulations? I can do the math, but 1+1 doesn't seem to always equal 2 in implementation.
You could do it with as little as 100 acres (well in theory you could do it on a single acre but a property of the correct dimensions does not exist (1210 yd long x 4 yd wide)), but that is assuming that the property is a properly shaped rectangle and your range spans from one corner to the other. I'd be looking for at least 400 acres for a range of that distance if I was putting my home on it as well, and there are plenty of 400 acre properties that would not support a 1200 yard range due to the lay of the land.
As a side note - don't be scared of buying land if you can swing it, they aren't making any more of it. I'd rather live in a $25,000 cabin that I built on 500 acres in the sticks than a $1,000,000 house on the golf course in town, even though the mortgage would be the same on either.