[Ninebot-PTR-Elite+]

Ditto!
Larger wheel base and tire size would solve many issues. I have three Ninebot PTR Elites that my wife and I use daily. We are in a gated community and they are ideal. I have left leg impairment and neuropathy causing difficulty with sensations. I can hit a asphalt repair cut in the road with ease now, but when learning, took a few spills and machine run aways ( me on ground or road while machine goes twenty feet before emergency shut down. ) Never had collision - Thank God!.. Been three years now and have even had to rebuild a battery pack once. These machines are no longer being marketed in the US by dealers, though some still show up on ebay. Segway repair facilities still work on them (I assume) and battery replacement can be expensive.
Nonetheless - larger footprint machines are out there. Weight is your only downfall. A pull up carrier on the back of your vehicle could solve that.

Keep at it and good luck.