In the current version of Sweet Home 3D, you may simulate more or less an elevation view by choosing a very far point of view and a small view angle, but the program doesn't let you see real sectional and elevation drawings using an orthographic projection.
If you want to see if it's enough for your needs, use the free version available at download page. As explained here, the GNU GPL free version of Sweet Home 3D isn't a limited version that would offer less features than the Mac App Store version.