Unsuspecting looking for scooters

Hi, I want to/must start driving the scooter again with 33. I did a 1b driving license for 80s at that time and drove a few years with 70s Simson. We want to buy a house now, which means that my way to the station (70km commuter path one way) rises from 500m to 2.5km. That’s too far on foot. My idea is to jetz with a scooter through the city to the Bhf. The whole should be quite cheap, but I want to be weatherproof and float under way as far as possible. I have even considered BMW C1, especially because you can ride without a helmet. How practical is such a part? It is also necessary for a 50’s who can do it on 60kmh or so. I am currently completely at a loss – i.e. brands, types and cylinder capacity open, which is completely sufficient. Please give a Dau tips on maintenance costs, from when to the TÜV, which insurance/tax prices for the different classes 50/80/125 to me. come, advantage 2/4 clock air/water cooling, what I know.. etc. The part should mainly serve only to the way to the bhf low maintenance and be quite quiet so that I do not wake the family in the morning. Thank you!