I would aim for a lightweight ebike (mo more than 40lbs/18kg). Motor power and battery should be irrelevant for the range you are doing and an ebike that is lightweight. It'll give you plenty of juice and range regardless.

Being lightweight comes with a few versatilities: 1. You can pedal normally like a regular bike without battery power easily. 2. You can mount on an affordable regular trunk rack on your car instead of needing a hitch rack. 3. Easy to carry up/down a set of stairs. 4. More nimble and maneuverable in traffic.

You might be tempted to get one of those fat tire ebikes that weigh 70-100lbs, but I'd advise against it because, in my opinion, what you lose in terms of portability and flexibility is simply not worth it unless you're going for the cargo form factor, which grants you utility.

Also, make sure whatever ebike you get, they have a dealer network that will service the bike because otherwise, you will regret it when you need to bring it in for maintenance and you will find that no shop is willing to work on it.