How do I test a 220v tanning bed without an outlet?
One option, if you truly don't have any 220v outlets in your home, is to take it to a local RV park/campground.

Most campgrounds have multiple outlet types and are easily accessed by a truck so I think this could be a great way to test an electric appliance before moving it into your home. You'll need a site with a 50 amp hookup. I'd try public campgrounds before private ones.