Hi Shawnette, Yes 3 acres is more than enough depending upon several factors. One would be the ability of the soil to handle the septic system, but even so there are other sewage/waste systems that can be installed. The other thing is how level is the property? You do not want to try to place a double wide on the side of a steep hill. I know the owners of a dealership in Hot Springs. They can help you.
Yes. But that also depends on the perc test or percolation test, which is a test to determine the capability of the soil to absorb liquid, both for construction and septic systems. Your perc test will tell you how much land you need under you to absorb the liquids. If your test says, .75, then I would try to find about an acre to sit on.
But as far as space goes, you can fit a double wide on far less than 1 acre.