If it fits under the roof of your SUV when it is on the angle just buy a couple of folding ramps. Hook ramps on the SUV and roll it up. Ramps fold up and should fit in the SUV.
Just be sure to do the math for clearance when it is on the angle going up. :W
OR
Just buy a hitch mount cargo carrier with a ramp. They make a ton of different types for disabled people who use those big scooters.
We must be willing to get rid of the life we've planned,
so as to have the life that is waiting for us.