If you want to void your warranty you could make a trailer out of the front clip of a compact car to use as a range extender like the CTO of Tesla did with his converted Porsche while he was in college.
You know, simply have that gas engine push you when you need that extra range
Sadly while waiting for what seemed like forever for my car to arrive, I engineered a similar contraption that I could have built for about $1.5-$2k.
I got the ecohitch that I will install when it gets warmer (spring). I will use it for a bike rack. I would recommend it if you are looking for a hitch. The build quality of the hitch is superb. However I was a little disappointed with the quality of the paint job for rust corrosion purposes. I'm repainting mine for better rust protection seeing as how I live in the rust belt.