You need to understand what a custom home is before you can start thinking about how to build a custom home.
A custom home is a home that is built to the specifications of the homeowner and is customized around their wants and needs. Find out more info here about custom homes.
This makes the home unique in and of itself and it makes it much more expensive. The benefit of a custom home, though, is you can get it tailored to exactly what you want and need.
You will need to have a home designer that specializes in putting together a custom home for you.
You will not be choosing from one of many floor plan options, but you may be using a few of them as a guideline to get an idea of how you want your custom home to be built and designed.
You will be able to cater to yourself instead of having one of those cookie-cutter homes that looks just like everybody else's home in the neighborhood.
Make the bedrooms large and any shape you desire. Give each bedroom a walk-in closet and a private bathroom if that is what you want.
Searching for a home improvement contractor is not a daunting task if proper research has been done prior to making such a selection.