

Turn something this into a moderately off road capable adventure bike and I’m sold. The BMW and KTM guys will absolutely pay $20,000 for it, albeit maybe not $37,000.
My KLR has about 200 miles of range per fill, if you’re even the slightest bit careful with it, which is necessary for excursions out into the bush where there are neither gas stations nor charging points.








Given your requirements of no cloud, no SaaS, and running in Linux you have already arrived at the correct two choices, depending on what you’re trying to model.
I am a diehard FreeCAD user, and I would say just stick with it until you are able to build what you’re trying to build. Via the expedient of Noodling Around With It I’m now proficient enough to do everything I personally want to do with FreeCAD, i.e. using its part design tools and studiously avoiding all of the other workbenches I have no use case for.