Hello and thanks for your reply - I do use my BMW i-3 on occasions where Iím proving consulting and stuck at one location for a period of time.
To avoid all the hassle of towing I just use my aluminum trailer. Itís so easy and Iím not adding mile to the i3. I included an image of the trailer with my CanAm. We have been driving i3ís since 2014, my 2019 model had the big 120 pack and it averages 170 miles plus I have the RX should I need no find a charging station. By the way, our latest addition to lithium is our Jaguar I-Pace, the car is unbelievable interior and quality wise, gets 250+ miles and makes the Tesla look like a Tonka Toy in every respect. I included a few images.
Keep us posted on your lithium upgrade - if you have question just PM or email me Good luck with your project.