Get something mainstream. As long as the bike has one of the following engine systems: Shimano, Bosch, Specialized, Mahle, TQ and a couple others I can’t think of off hand. Any of the other weird ones are often impossible to diagnose and work on
Bafang motors are a crap shoot. They make a couple that are okay, but also a lot of low end, sketchy systems.
Electra has a couple of cheaper models that come in under $2k. While the motors themselves aren’t unsafe, I think the bikes themselves have underpowered brakes and the like. Something like the Specialized Globe is $2800 and is a pretty solid, utilitarian platform.
Avoid Rad Power, Lectric, Super 73, and any of the other weird, fly by night direct to consumer Asian brands
If it’s your interest, why not? People buy all sorts of stupid shit. At least my expensive, stupid shit keeps me in shape.
My road bike and mountain bikes aren’t even top tier and both individually coast twice that. A new, tricked out Moots or SWorks is $15k.
A $4k eBike can replace your car and save tons more in the long run