On top of your considerations should be to find out whether the theme is simple to use. Try to avoid themes that are overloaded with colors, animations or layout complexity. Your objective is to adapt a theme that supports your intended goals. A simple theme that is stylish and functional is better than a bloated one.
Don’t be tempted to bypass the demo as it will help you get a feel for the theme. Check out the design elements and the constituent features that are included in the theme. It is also important to test the speed performance.
Is the theme supportive of different platforms? You can imagine how stressful it could be to find out that your website is not viewable on various browsers. Make sure the theme you settle for is proven to work perfectly across the board.
Check to find out whether the theme is accompanied with important plugins such as WordPress page Builders. Pre installed WordPress page builders plugins are essential, and if not available, it would mean that you have to result to the services of a professional web developer.